The effort is far too demanding for the pay. Imagine doing 50 lb dumbbell farmer walks up and down 50+ flights of stairs in the span of 2 hours, and if you're in Arizona like me, the summer nights of 110+ degrees will nearly kill you. At the end of the night, you'll collapse in your car and won't recover for another 20+ minutes and will realize you didn't even make more than $30 for that amount of effort that night. (if you're an efficient worker, you will be paid less, since you finished the job faster) I don't think even construction workers are made to work this intensely in that short of a time period. Just get a job at Mcdonalds. They will pay the same but your body won't die. Or go work construction. I heard HVAC pays pretty good.
Some apartment complex are better than others. The apartment I was assigned to had FAR too many staircases. 50+ in one night, because each apartment had it's own staircase, and I had to walk up every staircase to check each door, in case anybody had any trash that was hidden by balcony walls. The apartment that I was trained at, however, had only 12 or so staircases, so the workload was much easier. If you're lucky to get an easy apartment complex and don't mind the workload, stick wtih it. It's not a bad job otherwise.