10$ for a mow, trim and blow is dirt cheap! Might as well work at Burger King for that chicken nugget money!
I charge 20$ a cut usually. That is about 2000 square feet of lawn and sometimes less. The 25$ lawns are a little bigger or have some pita factors. Some I do for 30$ too. When alone, I can do 2-3 lawns an hour which sums it up to 40$-60$ hour.
In another place, I lowered my prices slightly, because I already have 6 yards there. I can do 5 in 1.5 hours alone! Which ends up being about 90$ in my pockets = 60$/hour. Not bad for working with a 21" mower.
Just the other day I quoted for two lawns for a full summer. Some low baller went way low and I didn't get the deal. I didn't mind, because the yards were ugly and renters lived there = garbage all over the place.