Have you calculated your overhead and operating expenses? Do you know how much you need to charge per hour to make enough money to cover your expenses and make a profit?
There is a free snow plow estimation calculator
on the forum here that can help you calculate your costs.
Then from there, because snow plowing prices will vary from area to area, it would be beneficial to ask around to your friends and family in the area that pay for snow plowing services and see what they pay. Some of your friends may have access to snow plowing bids for work or for their home owner associations. All the information you could get would be helpful.