Biweekly customers are not the way to go. We inform everyone now how we cut.
Our first year we did take on the biweeklys, but no more.
We now have 3 customers left that are every 14 days, but their yards are such slow growing yards, a weekly cut would just not be warranted.
Biweekly accounts just chew up your time when you could be focusing on good customers that want their yard looking good.
I am basing this on the types of grass we cut here in PA; Maybe in other parts of the U.S. you can get away with a biweekly, but that would mean you would need to pick up that many more accounts to equal out.