I think it depends on what you want out of the career. If you'd settle for nothing less than a legacy job, then it's a very long shot. If you'd settle for regional Capt, then you'd probably have a pretty good shot. If you'd be happy with some 135 charter type jobs, or freight, or maybe a mid-level corp job, then you'd also have a good shot.

Basically, if you would be happy making next to nothing flying for a couple of years with a good chance you could make 40 to 60K in a few years, it might be worth it.

The best thing you have going for you is a solid backup with previous job experience. So, if you decide to go for it and it doesn't pan out as you'd hoped, you might be able to slide back into construction.

It really depends on your expectations.

Aviation tends to ebb and flow with the economy. The economy is down at the moment and may be for a while. Those that take the risk now will be there to benefit when things turn around. One thing is for sure. There are no guarantees in this biz.

Don't listen to the big academy marketing (I've even seen such ads at the banners at this site) that say "train with us, airlines are hiring pilots now". You'd be better off buying your own plane (one like Skyhigh has) and taking your time. Or, take your time and save money by sticking with your local school.