This isn't plumbing, this is tree work. I filed a dba, bought insurance, and started my business. Have you been climbing/cutting for years, or did you just start getting into it? Have you ever had to spend a full day climbing yet? If you notice, there's a bunch of fat, old, and happy plumbers, not so much on the tree guy front. Especially starting in your 40s, it's a young man's game, which is actually an equipment game. Why don't you try to get a job doing part time tree work working for another company? That'll show you what it's really like. I know union fitters here that took a withdrawal card to cut trees full time, but they don't climb at all. Lift or nothing, mini and dump trailer and headed towards cdl trucks, big grinders, etc. It's honestly mechanical warfare, the less you grunt the more you make.