Build A Swing Bike Parts Needed To Build A Dirt Bike From Scrap?

Parts needed to build a dirt bike from scrap? - build a swing bike

I've decided I will try to build a dirtbike since the beginning. I do not want to buy a gross. "What can I buy parts like frame, sub frame, suspension, swing arms, etc.? What do you think is the cheapest brand of bike (no points built) to!