That's kind of like a client calling and saying "how much to groom my dog" when there is no other info given.
Your area, your prices, number of dogs per day, etc make a HUGE difference as to what a groomer can make. In my area, if I worked for someone else doing 8 dogs per day, 5 days a week I would gross about $57K(based on the previous salon I worked at and her prices and just her min hair cut fee so I'd prob make more, cuz I'd go back there if I had to go anywhere). Now my employee, if she grooms 4 dogs a day 5 days a week at my minimum hair cut price she'd gross about $34K. (since she does many that cost more than that she could easily make more if she worked 5 days a week) This is paying 50% commission. It's what I earned and what I pay.
NOW, that being said, IMO it would be VERY hard to try to start a business supporting an employee from the get go if it is mostly or solely a grooming business. All the seminars I have gone to and courses I have taken have said not to count on being in the black for at least a year and to make sure you can cover expenses without any income from the business for at least 6 months. That would be really hard with an employee to start with.
What a caterpillar considers the end of his world, we call a butterfly.