I agree with feline fanatic's semantics, as far stippling being (technically) a very tight stitch. What many call stippling is actually meandering, which is just a bigger version of stippling. Whatever... I think we know what you mean.
Part of running a business includes paying taxes. If you make more than a small amount ($400???) you will have to pay your social security and medicare taxes on the profit from the business, and that's a hefty percentage (over 13%?) that has nothing to do with your overall taxes. (In other words, even if your total income is so low that you don't pay income taxes, you still have to pay the social security and medicare tax.) Be sure you account for that in your pricing and keep records! There may be additional business costs, such as state and local taxes, business license, additional insurance if people are coming to your home, etc.
$87 for a queen is about $.01 per inch (figuring 87"x100") so it's definitely not too much for meandering and might be very low, depending on your area. Some people make much larger quilts and still call them queens, so you might want to state your charge by the square inch. Good luck with your new business.