I have been looking to fly for the Army for a while now. When I was looking at civilian flight schools, I was finding that most schools were in the 45,000-60,000 dollar range, which was about a year and a half, I think. I believe it would get you a personal license, and a chance at becoming an instructor for the school to build your hours to get your commercial rating.
Even after that, the amount of hours needed to get a decent commercial job generally (not always) would send most people deep into debt, and chances of getting a job are still slim with ex-mil guys charging for the jobs, also.
On the other hand, I hear the market is currently flooded with Viet Nam era pilots (the Army trained thousands of pilots during that time, i guess) who are starting to retire in generous numbers, leaving lots of jobs available.
But don't quote me on any of this :)