IMO you have no choice but to take the job. Do what you have to do to make happen what you need to happen. Janitorial work does not tax ones abilities. There should be little stresss, just full days to look forward to. However, this in itself may be stressful. To me, it would be mindless and boring, but that may not be a bad thing for your situation. You will have allot of time to think about other things in your life, hopefully the positive, and listen to allot of music.

BTW I think it is federal law that if you work longer than 35 hours per week, they must provide you with health insurance. However, the cost to you may be prohibitive, or the deductibles may be high, for examples. But health insurance from a school district should be very good. FWIW