$40/Hour?! Halve That!
This person was looking for a cleaning crew but only wanted to pay close to nothing for their services. $20 per hour isn’t that low for some jobs, but if you have a huge home, people are going to see your offer as a lowball one. And let’s be frank, it really is for professional cleaning services.
It might seem fair to you, but that’s only because you’re a choosing beggar. What you perceive as “fair” is actually insulting to others, especially when it comes to cleaning your home, and nobody knows what that entails. If you’re so reasonable, then come up with a more reasonable offer.