So just to let you guys know that I have decided to buy the 150 tall that I was looking at. I've ordered a basic Spectrapure RO/DI unit, salt, sand, a refractometer, and a Tunze pump for the sump.
The seller thinks he has a home for the fish, which are gorgeous, fat and apparently healthy. I didn't see any obvious pests besides normal green algae. Lots of purple coralline algae, two black urchins, some hermit crabs and a theoretical starfish. I think I can just brush the algae off the rocks before I move them. Going to put them in tubs with a heater and a power head so we can take our time cleaning up the tank and re-plumbing. I want to try an herbie setup- just two holes.
The tank has some scratches from the magnetic cleaner. I may turn it around, which would put the overflow on the front right. Maybe put some window tint film over that section to make it less noticeable. They aren't that big of a deal, so I'll just see which looks better.