Cleaning Lady needed for small home

My boyfriend and I live in Lake Summerset in a small, 2 bedroom 1 bathroom home. We both work full time and I actually work in Madison, WI and don't get home until 6:00PM or later. We are busy entertaining on the weekends and we have 2 dogs. I am looking for someone that could come once a month to do a thorough cleaning of the whole house. We do not have a basement so it is just a ranch home, one floor. I would like to spend $50 or less per month. I would like someone experienced and trustworthy as we will most likely not be home during the cleanings.