building would probably be the most inexpensive for you, i did the same thing. if you wanted to build i sudgest checking out my sponser, silhavy aerosports (
www.silhavyaerosports.net). 35% kits are around $450. the 35% that i built wasnt hard, you just have to think through it and you should be fine.
edit, the link wont work, so click on the link in my signature.
brian