I'm not sure it's possible to get a Dana 44 front done for that much. :( Unless you've got the skills to narrow it and build it yourself. But you should be able to beef up the Dana 30 a decent amount.
To keep a Dana 30 alive under 35s, I'd go with alloy shafts and maybe CTMs, a truss across the top, top quality aftermarket gears, and I'd stick with an open diff or at most a posi. That helps shock forces to move to the free side rather than concentrate on the side with the stuck tire.