A guy with limited hours to mow, and no skill yet, like the OP which is what we are talking about, can't make GOOD margins. You have to make up for tiny margins with high volume. That's all I'm saying.
What do you consider good margins?
I know a guy who cuts eow, on demand, overgrown stuff, etc., for cash, has 0 insurance, low grade/cheap equip, etc. He does very well for himself - not how I would recommend doing things but it’s his business, therefore it’s his problem.