well it jsut sounds like little fiddly things so just a matter of finding the parts. the hand break light doesn't sound good. paint could cost anywhere from $1500-3500 depending on quality and where u go.
the owner being dirty will just need some soap, shampoo and conditioner or get him heads and shoulders if he has dandruff. colonge wouldn't hurt either and a scrubbing brush for those hard to reach and dirty places. As for no time to wash himself tell him to make some time or he will fail at life.
like at least if you got the rwc you would know what the car would need as they'd check the whole car. if you get the car and u do the rwc urself i notice alot with r32's that suspension parts are always stuffed including shocks so thats a few hundred depends on parts and installation.
i jsut think you can find better mate. like if thats all u can afford and want it so bad go for it...but i'm 100% sure another one will come up much more cleaner, newer and with rwc in the next week or so like they always do.