You just have to find the right person. I have a short list of people who are willing to come over to my shop and work on my projects for a reasonable amount. They typically have other jobs but they are willing to moonlight for a few extra bucks. If you know someone like that it can really speed the project up. The other way to do it is to work back and forth with a buddy who also has a car project. Help him one Saturday with his car and the he can come over and help you with your car the next week.