You should also investigate your own home-state public Us. Some of them have flexible admissions policies for non-traditional age students, and the costs would likely be reasonable.
Depending on the skills you have to offer an employer, another good option would be to get a job at a college or university that has courses you like, and where you can take a certain number of classes each semester for free. Most colleges and universities offer that as a benefit, and many non-traditional age students complete their degrees in that way.