My consulting rate is pretty high dude. LOL. I've shared the language from my mowing agreements here before.
My section on that is as follows.
Spring & Fall Cleanups: Hourly at $60/hour - 1 Hour Minimum
We perform spring and fall cleanups on all properties we service unless it is clearly not necessary or you make other arrangements and inform us of them in advance. The lawns we service need to be free of debris in order for us to safely maintain them.