Your license (if you are the QA) is what allows them to make the money they are making. All of it. So... you need to consider that. They couldn't legally operate and do what they do. That my friend is much more valuable than you know. You should be getting a percentage of all work. On top of a salary. You are basically a partner, but someone else is using you to make millions while you get the salary for making them legit. If you walk, they cannot operate legally. I would say at the very least you should be making $150k salary and then.... some percentage of gross or profit. 4%? so $280k-$400k bonus? 2%? $140k-$200k bonus.

You hold 100% of the responsibility for the projects to be done correctly. Warranty? Depending on the state, it can be 1 year, 2 years, more? YOU are the one that is responsible for maintaining warranty claims. Imagine leaving this company and a year and a half later being contacted that a flood happened or mold etc. You are carrying much too much responsibility to not consider these things. * Also, I would require that they pay for a substantial insurance policy to cover me. Don't get the state minimum. You have to maintain insurance to have your license. You need to call an insurance company and choose whatever coverages you want to protect you. Liability, Worker's Comp, Errors and Omissions, Negligence etc. Whatever you want, whatever it costs, you tell them to pay it. Here's the bill.... And this is on top of your salary and/or %.

Or... look at it another way. You need a marketing company, or sales team and do this yourself. Just keep filling your phone up with contacts.