I googled "Jeep Hang Glider" and saw that most of the rigs people are using have a vertical support at the very front of the vehicle. I'm assuming that is because the hang glider frame would sag down and bounce/bend if not supported? Is that right?
Since you mentioned "DIY", maybe you could find/fabricate/alter a front bumper with a receiver hitch and come up with some sort of cradle to support the hang glider...?
So you'd have a vertical bar with a "V" in the front hitch and the same on the rear hitch. You'd want to support it in the middle (both vertically and horizontally) as well, but you could eliminate almost all of the weight burden on the ends.
If this guy can do it, then you can do it: