anyone into custom choppers?

I've been thinking about buying a rolling chasis and building one. I have no idea where to look or start. I like them long and low. I also want a soft tail with a 300 tire. I've been told you can save a ton of $$$ doing it yourself. Any of you guy's know about these things or have you researched it. If so give me some links.

On the other hand it looks like you can buy a used one some what reasonable but most are hard tail.