Stop in for a cup of coffee

I dug the beginning post holes for a deck expansion on the instructors quarters. Only about 12 more posts to set! Arghh.
My goal is to dig at least two holes a day. Keep in mind there is no shoveling, it is all rock after about two inches of top soil. You basically break the rock with a Johnson bar and then crumb out the pieces by hand, it sucks.
Can you rent a bob cat with a drill? Did that here for the fence. Wasnt bad either think 200 a day.