I'm not trying to dig on you too hard bra, I know somebody without a degree and minimal times that actually went through the hire process at NWA about 7 years ago. No college, no jet time, some "pic" riding in a B90 King Air and maybe 2,500 total time. His big goof up was the 747 sim ride they gave him...had he told before hand that he was going, I would have told him to get some sim time on the credit card before going. He's a salesman now, filling the soap dispensers on his sales route, taverns, gas stations, stores. He's "harry chapin" flying now.
I think the realistic thing, is to not give the original poster false hope, but not discourage them from following their dream.
To say 3 years is not realistic, though it could be. To say 5 years, is more realistic. Who knows? Like YOU said...your milage could vary.
I'm going to stick with what I said before, if your life long goal is find yourself in the profession of flying aircraft and you find yourself professionally flying aircraft, you're there.
I have several friends at SWA. In fact, one of their long time captains is the reason I struck out for a flying career. We used to work together at a sporting goods store back in the early 1980's. There was a time that I would have tugged on his coat tail for the favor, now I'd just like to hook up with him, grill out and catch up on old times. In fact, I think I might just do that, he was a hell of guy.