Same way Kmart bought sears. It’s fairly common for smaller companies to buy larger ones at this point.
Remember the discovery ‘channel ‘ bought Warner brother whole ass media conglomerate and at the end of the deal the people who made that happen made 10’s of billions.
What is the form factor? See if you can just get a new case for it. You can always under clock a system to make it use less power, workstation cases are quieter than servers.
Noise is almost always the fans. Servers are supposed to take a little space as possible and depend on super high airflow from a cold room.
With the cost of components you are going to have a hard time selling a system to buy a different one. 64gb of ram is pretty sweet for a home server. You can do all sorts of silly stuff and still have a responsive system.