I concur with @Garfield’s point of view and suggestions.
I will change the sentence “I hope you have very little to do”, which is slightly ambiguous. Might refer to “I hope you don’t want to do much while here because my animals will keep you busy” or “I don’t think you will be very busy with my animals because there is no dog to walk or chicken coop to clean out”.
If the latter, as I suspect, I’ll write something like: plenty of opportunities to go and explore, or work from home, as the outdoor cats, chickens and goats only need feeding.
Also, mention something about how warm and toasty your house will be. There have been quite a few threads about house sitting in the UK in the colder months with sitters finding out that many house owners there keep their house relatively cool.