yea cuz one of my buddies has a shop and all he does is build whatever people want him to build all the way from harleys to diesels and he has more money then he knows what to do with.  i guess you just need a good reputation of doing good work and a lot of people to spread the word to make good buisness... 
well if anyone needs work done in Napa california im up for anything. but i guess if you cant do the work yourself you wouldnt be on here...