I agree, you only need a remote if you're primarily service oriented but if you get a remote, hourly billing is unfair to you. I bill a flat rate for repairs because with a remote I can do them faster than the guy that doesn't have one (almost 2x as fast) and I don't believe I should be financially punished because I made an investment in tools to improve my efficiency. Billing flat rate for standard repairs also insures that you aren't making the customer pay for a learning curve. When we get into retrofits or something super difficult then we'll go to a T&M billing but most of the time you can quote the flat rate and do fine. You don't need to carry a bond, you're still not going into the house. Liability insurance will be fine but when you talk to your agent, make sure they differentiate between lawn/landscape irrigation and plumbing. My agent tried to classify me as a plumber when we added irrigation and it would have more than tripled my policy cost.