I only charge $25 @ hr, but that's my choice. It more than covers my labor IMHO. Sometimes less for repeat customers. I tend to get more repeat business that way. The rest I leave up to the customer, I don't try and sell them the most expensive equipment, just what they need to provide what they want. I only make suggestions if they are planning on expanding in the future. I'm not out to become a millionaire, I'm more interested in making people happy and taking pride in what I do. So far I haven't had any problems that couldn't be resolved quickly, and most of the time I don't charge them for a re-visit unless they damaged something and it needs replacing, then I generally do it at cost. And I've even did free reinstallation for people after big storms or hurricanes to get them up and running again. Most of the time they will insist on offer something for coming out, so I'm not walking away empty handed by no means, not to mention all the great friends I've made in the process. Far more priceless. Plus I don't generally do commercial work. Except for a select few that have small at-home businesses or agriculture. I don't do this full-time anymore, by choice, I consider myself semi-retired, I enjoy spending time at home with family.