If you're working 40 or more hours a week, more than six credit hours are going to be really difficult, particularly if you are expecting to get A's. Remember that, apart from the in-class time, you will need to read chapters, prepare homework, write papers, study for exams, work on projects, etc. I admit to being a perfectionist, but taking one 5-credit class (in addition to my full-time job), I ended up taking vacation time from work, on occasion, because I needed to study. As higher management, I could get away with that pretty easily, but it might be more difficult if I was a "regular" employee.
And while most professors at community college are sympathetic to the working student, some are totally clueless. I had one professor that would go off-syllabus, and schedule an exam on Wednesday, for example, for material that he just finished presenting on Monday. How do you study for that if you're working all day Tuesday and taking another class Tuesday night? I ended up having to withdraw from the class (with over a 100% average, unfortunately).
What happened to full-time school, part time job? That way you can get student loans since you are a full-time student, and devote most of your time to your studies, while bringing a bit of money in to cover expenses.
If you're willing to go away to school, there are a few full-tuition work study schools where if you work year round at the school, your tuition is entirely covered. The College of the Ozarks is one, but there is at least one other I can't remember the name of.