What company makes a good build-it-yourself light weight plane?

Question

I'm betting I could get the hang of flying pretty easy, but it needs to be affordable, like $300.00 or less.

Answer 1

$300 would buy you a lot of paper... if it works on a smaller scale, why not?

Of course, you'd have to think of a way not to roll, nosedive, or just plain crash like every paper plane I ever built did. But those are mere details.

Answer 2

You can make your own kit with a lawn chair, a fan, and a lawnmower engine.  Throw an old hang-glider canopy on it and your ready to go!  Don't forget to use lots of duct tape!