Hey Tim,
Use magnetic business cards... they really work for getting customers to call you back.
I know 20 jobs a day per crew sounds like a lot but that's an average day for us. I've done as many as 30 by myself depending on travel time. We also do whole townhouse complexes and condos so we can actually do 150 a day in cases like that.
I currently have 10,517 total clients but we don't do everyones gutters and we don't do all of them in the fall. Some of them wait until spring, some do them 3 or 4 times a year and all year round. Some clients only have them done every other year also and others do them after fall and through the winter.
On average, it takes us about 10-13 minutes to do gutter cleaning on homes with a two man crew.. As far as travel time, we have so many clients clustered together most of of the time I'm sending a crew two a 3 mile block area.
I've been doing gutters for 15 years now so I've learned and taught my guys easier and faster ways of doing things.
When I say a house, I mean a whole house, 1, 2, or 3 stories. I know this may sound impossible to you guys but trust me, it can be done and I've even shown a couple other companies how to do it. Come on over if you like, I'll gladly show you how I do things.