Definitely go to the community college. I'm not familiar with that particular school, but there is no reason to pay $19,500 for a for-profit associate's degree when you could get at least as good a program at almost any community college, and you would have a much easier time transferring to a four-year college, should you eventually decide to go in that direction, from the community college.
And yes, it would be easier to get scholarships and grants at the community college. Since the for-profits like UOP are in it for the money, they aren't too interested in giving you a financial break.
This is what you would be taking at Chandler-Gilbert College:
http://webport.cgc.maricopa.edu/publish ... 0929-30516
This is what you would be taking at the University of Phoenix:
http://phoenix.edu/Programs/Sealsheets/ ... CC-012.pdf