With a standard Joe Bloggs PPL you can build your hours by way of dropping parachutists or towing gliders. You can not be paid for either, but you do not have to pay the expense of flying the aircraft. I'm a diver too (though its been a few years) and I plan to do this some summer @ Sebastian in FL, don't know the rules & regs in FAA land but I will look into this when im finished PPL. (Right now im much too busy with ground school!)
Good luck,
5252