Welcome! Since you've been on the forum awhile, you should already know about Ed Felker's excellent crowd-sourced manual for Vegas/Axis. It will help you evaluate potential purchases.
Don't rule out a new unit. I've seen times when a new rig is a better value than a used one. If you are open to going a ways to find one, you might save a ton of money by flying one way and driving it home.
Have fun shopping!
I think we need to stop calling it "working from home" and start calling it "living at work!"