Sorry, just want to add my two cents here. for what it is worth.   I may be preaching to the choir.

I doubt you will get any takers (but maybe you have).  Your software is 20 years old.  It is time to belly up to the bar and invest in current software, be it Sage or a different platform.  If you stay with Sage, it will require several installation steps to get 4.05 up to v2023 (please tell me you aren't running v4.05 payroll).  And then, once you have proven that it can be done, you have to do it again to go live.  Should be faster the second time, but still has to be done.  You will pay many dollars to accomplish this.  Or you can switch software and incur set up and training costs.  Probably more expensive but maybe big picture, this is a better alternative.  Just depends where you want to be.  I must say, however, Sage v2023 is a totally different software and IF you invest in employee training, it WILL pay dividends.

I recently had a 3.71 user approach me.  They went the Netsuite route ("liked" the user dashboards).  Spent "100K" for the solution but were not satisfied with the results.  The modern software world has changed over the past 20 years.  In addition to spending dollars just to migrate the data, you are going to spend subscription dollars EVERY year to keep it active.  Just the way it is now.  All software publishers are on that band(k) wagon. 

You mentioned WIN 10 server.  WIN 10 is not a server OS.  Are you running v4.05 on a workstation in a peer-to-peer environment?  Certainly doable, but Sage no longer supports peer to peer networks.  If it is a workstation and you don't want to invest in a server, then you should contact a hosting solution vendor (AWS, Azure, Sage Hosting, etc. to put your software in the cloud.  You then eliminate the on-premise server requirement.

So bottom line, good luck in finding a Good Samaritan reseller to help bandage the existing system back to life.  If you do decide to modernize Sage to v2023 (soon to be v2024), any reseller that you find will probably charge a premium due to the age of your existing system and overall IT strategy.  Your leadership has shown that they are not committed to staying current with the times.  Yes, I certainly understand your leadership thought process, short sighted as it is.  There are many companies that have similar ones in the software world.  Perhaps you should think about it the same way you think of insurance coverage and annual premium payments.  I am sure the client has many types of insurance coverage (building, contents, employee theft, vehicle, bonds, owner life, etc).  Why does your client pay these premiums (assuming that they do)?   Why not stop paying them?  After all, what ARE the chances of ever having a claim?  I have carried business insurance for 25 years and never once have had a claim.  Is it money down the drain or is the ability to sleep at night just a necessary operating expense?

I will step down from my soap box.  I apologize for any harshness conveyed.  I am one of those old guys trying to deliver value to your bottom line.  I have seen too many companies trying to pinch pennies while allowing dollars to flow down the proverbial drain.  Very sad!

Good luck!

Sorry, just want to add my two cents here. for what it is worth.   I may be preaching to the choir.

I doubt you will get any takers (but maybe you have).  Your software is 20 years old.  It is time to belly up to the bar and invest in current software, be it Sage or a different platform.  If you stay with Sage, it will require several installation steps to get 4.05 up to v2023 (please tell me you aren't running v4.05 payroll).  And then, once you have proven that it can be done, you have to do it again to go live.  Should be faster the second time, but still has to be done.  You will pay many dollars to accomplish this.  Or you can switch software and incur set up and training costs.  Probably more expensive but maybe big picture, this is a better alternative.  Just depends where you want to be.  I must say, however, Sage v2023 is a totally different software and IF you invest in employee training, it WILL pay dividends.

I recently had a 3.71 user approach me.  They went the Netsuite route ("liked" the user dashboards).  Spent "100K" for the solution but were not satisfied with the results.  The modern software world has changed over the past 20 years.  In addition to spending dollars just to migrate the data, you are going to spend subscription dollars EVERY year to keep it active.  Just the way it is now.  All software publishers are on that band(k) wagon. 

You mentioned WIN 10 server.  WIN 10 is not a server OS.  Are you running v4.05 on a workstation in a peer-to-peer environment?  Certainly doable, but Sage no longer supports peer to peer networks.  If it is a workstation and you don't want to invest in a server, then you should contact a hosting solution vendor (AWS, Azure, Sage Hosting, etc. to put your software in the cloud.  You then eliminate the on-premise server requirement.

So bottom line, good luck in finding a Good Samaritan reseller to help bandage the existing system back to life.  If you do decide to modernize Sage to v2023 (soon to be v2024), any reseller that you find will probably charge a premium due to the age of your existing system and overall IT strategy.  Your leadership has shown that they are not committed to staying current with the times.  Yes, I certainly understand your leadership thought process, short sighted as it is.  There are many companies that have similar ones in the software world.  Perhaps you should think about it the same way you think of insurance coverage and annual premium payments.  I am sure the client has many types of insurance coverage (building, contents, employee theft, vehicle, bonds, owner life, etc).  Why does your client pay these premiums (assuming that they do)?   Why not stop paying them?  After all, what ARE the chances of ever having a claim?  I have carried business insurance for 25 years and never once have had a claim.  Is it money down the drain or is the ability to sleep at night just a necessary operating expense?

I will step down from my soap box.  I apologize for any harshness conveyed.  I am one of those old guys trying to deliver value to your bottom line.  I have seen too many companies trying to pinch pennies while allowing dollars to flow down the proverbial drain.  Very sad!

Good luck!