I was thinking about a free offer to send a tester to potential customers. In my area the houses are very old, built in the early to mid 1900's. A high percentage of these houses have missing grounds, revered polarity, or no GFCI protection in the kitchen or bathroom- all things these testers could warn people of. Then they could call me to fix it Maybe I could get a small company sticker made and put it right on the tester.
Giving these testers away for free could become expensive, is there a way to qualify people first? Or is this just a bad idea altogether?