Dale:
Excellent foresight and I believe your efforts will be an asset to the community. I have read the negative crap written here on KLOV towards Chattanooga and believe there is room for retailers and DIY. Not everyone has the time or training to restore a game to pristine condition. That is why there are retailers/firms that will do it for you.
With that, here are some idea suggestions. To be upfront, I am begineer still to this hobby and some of the topics might sound basic but remember all of us started somewhere. Just picked a Red Baron upright. Definitely a project.
Some Ideas:
A. Power Supply - What is What? Condition and when to replace...
B. Wire Harnesses - What to look for? Maintence/cleaning and proper placement.
C. Side Art repair or Replacement: Some tips on how to do it better.
D. Tool Bench basics: What is on my tech's bench.
E. What to inspect when your machine gets to you from a Seller or your company?
F. AR I II, III, sound cards, misc boards