I've made my living with a camera for a little more than 25 years now and never once have I ever seen an accurate "market price" for any type of photography.
There have always been those will do it for cheap and there have always been those who charge a lot, and every point in between.
What Joe blow down the street charges has nothing to do with me or how I price my time, experience and the ability to deliver. You start worrying about what everyone else is doing and you'll end up driving yourself nuts trying to figure out why.
Like any business, you need a plan. What are your true costs? studio, equipment, insurance, materials, etc. What are the costs of acquiring clients? What are your replacement costs? Then you have to begin factoring in what does it take to make a profit. What will it take to expand your business? Don't forget your legal fees. Lawyers and accountants don't work for free and if you're successful you'll be using both. Also, don't forget about your not so silent partner (the IRS) who needs their cut of every dollar you make.
All of these factors (and more) are different for each individual business and this is why you can't always use the competition to determine what you need to make to operate your business.
Guessing at what you need to earn per hour/day/month/year is a sure way to fail in business.
A big part of your business plan will include who your potential clients are. Once you know who they are, you need to find out where they are. Your marketing needs to be tailored made to attract these potential clients. Showing up and delivering every single time is the best marketing you'll ever have. Always remember that a happy customer will share the experience with their limited circle, but an unhappy customer will tell the world. Never, ever, fail to deliver.
I could spend hours telling you how our studio attracts and maintains clients but that isn't necessarily going to help you in your business. Including myself we have six full time photographers, two full time assistants, and two full time office staff. On top of that my agent takes a percentage off the top. That doesn't include the contract employees we bring in for extra large projects or the extra materials that we use on a regular basis that most other photographers wouldn't dream of needing. So our rates are probably going to be quite higher than most individual photographers who are working full or part time even if they are in the same market. An individual commercial product photographer shooting for mom and pop stores probably isn't going to get the same rate that we get for shooting for ad agencies even though we are in the exact same business.
Think about it like this. Toyota and Bugatti both make cars, but the prices are vastly different. If you went out and started up a car company which end of the spectrum would you be on or would you be somewhere in between?
The business of photography is different than the love of taking pretty pictures. There are millions of people who can take beautiful pictures that would have no chance of running a successful business.
My advice to you if you are serious about running a business is to learn business. Take some business classes, find a mentor, do whatever it takes to learn how to successfully run a business. Learn how to determine your costs down to the penny. Learn how to do some marketing or hire it out. Don't allow yourself to get caught up in the idea that pretty pictures are going to be all it takes.