stretching the frame is the easy part. If you do not feel up to doing it, you may not be able to finish it. Unless you are going to use rattle cans, paint and prep is not cheap. You would, most likely, have to buy a parts cart. You have to build a new front seat pod. You would need a floor. You need to get longer brake linkage. F/R linkage. Throttle linkage. Are you going to have a roof. You would need to find a longer one. Just a few things off the top of my head. I am sure there is much more. $3000 might not be too bad a price. If it is all finished with good work, he isn't getting rich. A cart is a money pit when you start to alter it.