Community college program or "independent" school?

A community college near me offers a 6 week certificate course for getting a CDL. It costs $2k and I may be able to get financial aid depending on what grants are available (checking into that). It's 270 hours of training, 15% classroom, 85% on the course/road.

On the other hand there is an Alliance Tractor Trailer Training Center near me. I've heard it's around $4,600 (waiting for a call back to get the details). It's a 4 week course with 200hrs. I've heard mixed reviews about the quality of the program. There is also a Sage training center not too far away, I think it's even more.

Other than the cost difference are there any other benefits to going through a community college? For example, and this may sound like a dumb question, but I'm curious if a college program is more widely accepted/respected by the better companies?

I'd really like to find a good company I can stay with for a while and not be pulling my hair out to leave as soon as I get a year in. I've got a clean driving record and a stable work history, so I hope I can find something that pays well and will get me home to my family at decent intervals. The big dream, I know.

Right now I'm looking pretty hard at the college program. It's a big decision, I'll be quitting a job I've been with for seven years to go to school and go out on the road. I've been thinking about this for a long time and put it off for a while due to the economy but it's time for a change. I just want to be sure what's the best way to go and would appreciate some input from those with experience.