the only way for a tech to make money is to go to a customer’s home and do
work. Everything else that is done the 3 hour meeting, 7 hours weekly
research, 2 hour weekly duties, 20 min every morning meeting, and all after
work clean up and restocking for free.
The thing is, you are not working for free. The company pays you for the job you do. Your salary is computed based on the sales you make, not the hours you work. Thus, to figure out how much you earned per hour in a given pay period, you'd divide the commission you got by the total number of hours you worked. I'll call that result the "effective houly rate." If that comes out to more than minimum wage requires for that number of hours then the employer hasn't violated the minimum pay laws. It is, of course, true that the more work you do that isn't time spent with customers will reduce your effective hourly rate because your commissions will be spread over more hours, but it's not illegal as long as it doesn't dip below minimum wage. If you can find a job that will pay you a better effective houly rate, you can jump ship and join that other firm.
By the way, this kind of thing is common in sales positions and other types of work, too. I'm a lawyer. My pay is based upon the fees I bring into the firm during the year, not the number of hours I actually work for the firm. There are various things I do in my work that don't result in fees coming into the firm, but are nonetheless necessary. That includes attending non-client meetings, performance reviews of staff, keeping current each day with the developments in my areas of practice, etc. I don't get paid an hourly wage for that stuff in addition to the pay I get for the fees I generate. But I'm not working for free — it's understood that doing the extra stuff is part of the job and thus covered by the pay I get. Sure, my effective hourly rate would be better if I spent all my time on billable activities, but the other stuff is necessary and part of the job. There is nothing illegal how I am paid and nothing illegal about how you are paid, either (unless it's low enough that it can't even meet minimum wage).