If a customer made you lower your price on mowing, they will do it again on everything you offer. They know your weak, they call the shots. When you have perfect lawns you can call the shots and get a premium for your sevice. When a customer has control over your business They are putting a cap on your earnings. Decreasing your margins.
Everyday you wake up you have been given 24 hours. What you do with those hours determines how rich you will become. The rich work the hours you don't see.
Great Book: "Think and Grow Rich"