The lawn care biz. You learn to add, multiply, subtract, and divide in grade school. You learn the ins and outs of lawn care and landscaping by doing it. You learn about customer interaction by interacting with customers not reading about it in a book. There is a plethora of billing, routing, scheduling software out here. No degree required! No degree will give you the determination to get your lazy butt out of bed every morning, either. It's not needed. If you want to be a doctor go to college. If you want to be in this business then grow a set of balls and use some common sense.