Just like Dustin said! Some of us had a bunch of parts and this & that laying around and all the tools. Some got ridiculous good deals on all the parts, I did. Others didn't. Some are world class fabricators, others have to farm everything out.
On another forum several guys answered the same general question and the average price figured was $4,500-$8,000 with all kinds of variables. It's rarely cheap. Either don't do it if you can't afford it, or get all the parts assembled before you even start to tear into it. It takes above average skills.