This would be called a nanny. Just depends on what your experience is, and what people charge in the area. Usually it's an hourly fee when I was a nanny. When I left 4 years ago I was getting paid $14/hour for 2 children. BUT...I have experience working with children, have my first aid & CPR, and ECE. BUT, again, it varies per town/community.

Check out www.nannies4hire.com and www.canadiannanny.ca for what people are charging in your areas.

Good luck!