they are not that expensive. you can probably get a pretty decent build for less than complete bikes from monty and koxx.
these frames have been tested extensively by trevor bodogh, who puts more stress in a frame than anyone i know! it's a good investment for a well made frame that lasts a long time.
trevor has been on his prototype frame for more than a year and a half. he has ridden more demo's in the last year than i have in my entire trials career. the production frame has thicker tubing as well, so it should last a long time.
i should have mentioned as well, that there is a life time manufacturer's warranty on these frames.