Congratulations! Time to prioritize, though. If you really want to do a driving restoration, paint is not the first thing.
Start with the suspension, brakes and bearings. (otherwise too much temptation to drive as soon as the engine is in)
Then do electrics.
THEN do rust in the engine compartment.
I know you have a transmission, but unless you completely trust that it was not the reason the bus was parked, now ould be the time to replace.
Somewhere in there start collecting the parts for the engine. Your post about getting an engine was noted; a type III is NOT upright with a doghouse, was this a type III case fitted with that? Either way is not ideal for a Bay, you really need a 1.8 or 2 l to save grief; these often show up in the ads on TheSamba and such.
After that you should have a driver. (and a lot more time to consider the paint scheme)
Mine was somewhat like yours a year and a half ago, but it came with a working engine. It was parked because the fuel pump was bad.
Then:
Now:
