That does put you in a tough spot. Sorry I didn't realize your predicament, I'm spoiled by having too many vehicles except when it comes to keeping them all running! And yes, once you have the heads off and it is a valve problem, your best bet is to have the heads rebuilt by a machine shop specializing in that. You could do it youself but it requires some rather specialized tools so I wouldn't suggest it. Everything else is a piece of cake, relatively speaking, but time consuming and it sounds like that is what you're short of, well, that and cash. I have that same problem! Wish I had an easy fix for ya. Don't despair, you'll figure something out! Good luck...