Nothing can be built for not much money anymore, but a T bucket would probably be the most reasonably priced project. The best car for the money is usually the project that someone else has started and ran out of time, money, talent or all of the above and just wants someone to bail him out of it.... eBay is usually a good source along with want ads and other internet ads.... The harder you look, the more likely you are to come up with a good deal....