In my opinion your best bet would be to get your fixed wing ratings. Commercial SEL and MEL. Then Get your CFI and instruct in order to build time. Once you have the required FW time for an ATP (1500 total, 250 FW PIC, 25-50 Multi, etc.), a regional airline will hire you and give you the ATP checkride during training. This is an expensive route prehaps if you went to a school that provided ratings with a degree it might help.

The other option is the Military. Cheaper, but you'll owe about 2-3 years just for training, then depending if you go active duty or reserve you'll still owe a lot more time. It may be 10 years before you can apply to an airline.