Do you mind me asking where you live, CountryMommy? I am in Calgary and the going rates here are $30.00-60.00 a day, depending on your neighborhood. We live in a fairly upper middle class area - no starter homes in our community and almost everyone on our street has multiple professional degrees and works downtown, so I charge $50.00 a day/ $900.00 a month. I know that seems steep, but it's actually cheaper than some nearby neighborhoods! (and explains why I haven't gone back to work, with 3 kids who would need childcare!!) There are also not many day homes and no preschools in my neighborhood. So far, people have been willing to pay it. My sister lives in a lower middle class neighborhood and still gets away with $40.00 a day.
I'd go with what you have now and drop it if people are really questioning it. But if you get the right people, people who really want an experienced, qualified caregiver and a good program, then I don't think your rates will be a problem.