I've been in the lawn business for 3 years now, part-time. I am a tree guy by training, but, I do really enjoy cutting grass. I only have about 10 customers right now, but, it does keep me quite busy between my full time job at a tree company, and my tree work for myself. One of my questions is, I'm thinking of geting a walk behind mower next year. I only have a L120 John Deere homeowners riding mower, a push mower etc. My question is what would be more valuable to me (keep in mind I have 2 young kids and just bought a house. ie. not alot of money.) My properties range from 1 acre down to small residential lots (used to cut them all with a push mower, yeah that wasn't fun). Two of my lawns have extreme hills and I have to cut them with the push mower. Can you cut these hills with a walk behind? I can't decide whether it would be more profitable to buy a faster, larger riding mower or to try and increase the effiency of the slowest part of my jobs. Thanks for your time, any suggestions are greatly aprreciated.