Looking to build a budget bike for a friend. A BIG friend, who wants to try mountain biking.

He only has a budget of about 600-800 dollars.

Was thinking a steel frame and since I own a sweet sweet zion 660 myself, was wondering what you guys thought of a

6'4" 275 lb

guy riding a zion 660 21". He would ride XC. We live in michigan so the trails here are relatively tame compared to out west or east.

Thanks guys.