true Marc with keeping all the esential parts and selling off the frame/seat/tank/airbox you could do a hl for those $$
I was a little tongue in cheek as the original VMX magazine project HL started out with that kind of budget.
I guess it all depends on what you can do yourself, our friend Ola started with a Husky frame and modified it to suit. If you go for the GMC frame then you are going to be out quite a bit more than 5K. Mine went roughly something like:
GMC frame, exhaust, airbox,pegs $3800
Engine $2000 (megacycle cam 540 kit)
Ohlins $1000
Wheels $1000
Tank/seat $600
Fox Forks $2000
You can see how you get North of 10K pretty pronto if you go with the good stuff.