I mow about 12 condos and have a good chance of adding 2-4 next year. They are pretty small lawns in the front. Each condo is connected to another on. Each building is two condos and the lawns connect in the back. I'll probably continue to mow the front with a 21", but I would like to use a 36" Walk-Behind or ZTR on the back since the way they look is not so important. The guy that used to mow used a rider on the back. He had to quit this year because he got cancer. He lives in one of the condos, but his wife still mows. Anyways, should I try getting a 36" and 48" Walk-Behind or should I get a 36" or 42" ZTR. Is the ZTR going to cut as nice or would it be smarter to get two cutting machines of different sizes? Thanks for any input.