150K gets you two tickets from LAX - PPT.

30K of priority club a night for Moorea intercontinental
50K of PC a night for BOB intercontinental

You can go with Delta/AF miles too from LAX, costs more than 75K per person return though. not sure how much exactly. Also AF's flight doesn't go daily, so you are a bit more limited on dates.
AA (buying air tahiti nui) arrives at night. so you have to stay at Tahiti your first night, but it leaves at night, so you don't have to stay your last night.
AF arrives during day so you can skip your first night and go straight to another island, but leaves at 8am, so you have to stay the night before on Tahiti.. so works out the same.