I fear you will be frustrated in your search. Developing any inspection software is a time-consuming and capitol-intensive endeavor. To make it worth the developer’s while to generate multi-platform applications, keep them up-to-date, and provide technical support requires either pretty stiff up-front fees or ongoing subscriptions.
I can’t help but wonder whether a 1-3 inspection/month income justifies the time and expense involved in launching a truly competitive inspection service. In my case, I have invested easily $6,000 in equipment alone in the first two years and probably close to twice that in lead generation, website development, and marketing. It’s like any other endeavor; if you want to be taken seriously, you have to be presenting a truly competitive product. That takes a significant up-front investment.
All that said, I do wish you luck.