I'd suggest getting your instructor tickets, then start teaching part-time in the evening and weekends. Keep your full-time job to pay the bills. You will be able to support yourself while building flight time. In my opinion, instructing is a very valuable experience. This isn't easy, but is a frequent solution for many people who have themselves or families to support.
After a year of doing this, re-evaluate where you are and take the next step.
I've been doing this for the last year and went to full-time instructing as of two months ago. I expect to be working for a part 135 or 121 carrier before the end of the year.
Realize that this will take you some time. Everyone wants the fastest 3-month program to right seat in a jet for a major carrier. For the vast majority of us, this won't happen. I know it's great to dream about, but be realistic and start gaining experience flying in whatever capacity you can today. And keep flying.