Back when I was lurking the forums, Mike responded to a thread where the OP was having problems getting vehicles in the driveway. Mike suggested the OP to find a niche. Someone responded about contracts and the benefits thereof. I talked to my lawn maint. guy, got some tips and never looked back. I only have 18 customers. Mostly word of mouth and referrals. Keeping up with the Jones's mentality. I won't detail if the money is not residual. I have no need to chase after customers.
Bang 'em out at a profitable price, maintain on a regularly scheduled interval.
Customers don't care about product, machine, pads, etc...just timely, consistant results.