You need to realize that you can buy a finished car for less money than you can build one. But if you are bent on building one, the first thing you should do is find an experienced rodder to assist you. If you are able to do most of it yourself, you can probably build a barebones '32 roadster for under $30,000. It all depends on the components you choose, how much bling you want, and how many mistakes you make. Your car will resemble the bottom photo not the top one which is highly customized.