Yes you low balled.
Do you have a minimum price?
It should be $30 for a 1/4 or less. Then raise your price so that you are $60 for 1 acre.
Try to find out what the others charge in your area.
Learn your costs to operate.
Foreman salary, helper salary is just the start.
Liability insurance, gas for truck and equipment, repairs and maintenance, purchasing new truck, trailer, equipment when the old one's wear out, buy additional one's so you can expand to a second truck/route, advertising, profit for you.
If you are going to work for $10 hour there is no point to be a business owner.