I consider myself a pretty good plumber with significant problem solving abilities. In the same time, I am able to learn how to use a computer and put together

I consider myself a pretty good plumber with significant problem solving abilities. In the same time, I am able to learn how to use a computer and put together a WordPress site for my small business. I even learned enough CSS and HTML to embed some videos I did. In my opinion, this computer stuff is way easier than dealing with customers in emergency situations, lugging heavy stuff everywhere, and dealing with the daily... You see where I'm going. If anything. Partner with an awesome plumber and do part-time plumbing work while helping create software that helps the plumber build a happy customer base and get out of being the labor plumber before her body is destroyed from all that hard work. Think, online payment processing, estimate delivery/website, mobile app to take pictures of plumbing situations that can be married to estimates or remediation documentation, lead management, accept images from customers of their issues, etc. Eventually, you will have built out a suite of tools and will be able to sell that to plumbers and/or customers. Add in reviews, etc. and you've got Angie's List on the run.