Are you pulling the tranny and bringing it to the shop? If so, the time shouldn't be an issue. Rebuild is going to take pretty well same amount of time regardless of what is wrong with it. The big unknown is what internals need replacing! That tranny sounds pretty wrough. You might be better picking up anotherone cheap that is either known "OK" or minor issue and having that one rebuilt. For sure your into blocking rings, some synchros, 5th gear. Being that yours may have been run dry, bearings, re-shimming, differential could even be an issue. I'd feel better brining in a tranny that was running rather than yours. At least have a line on one, so if you bring yours in and they crack it open, they'll be able to tell pretty quick if it's worth rebuilding (an hour I'd say).Ian
Another option is to rebuild yourself. Only special tools needed is a basic shop press (Harbour Freight cheapy is fine), good snap-ring pliers, and a dial gauge. Brian from brokevw can get you any bearings, etc. you need and is very helpful.
...BTW your Bieber avatar is awesome.-Malone