More read'n is the way to go. I have been in the biz part time for several years, and this year I'm going full time. It is amazing at the expenses. I continue to find hidden expenses daily. It seems when you're out on a job and something breaks, you never have what you need. That means a trip to town or to the dealer to pick it up it is stocked. Then the time to replace and repair. It's always something.
You just gotta LOVE the BIZ. It's not something you will grow into, it has to be a God given PASSION. Then it will work.