We just got a new manager
and the first notice out said motor home were not to be parked in front of house all day...
This is a perfect example of why having an RV/Boat etc and buying a home where there are any type of HOA's in place is 'never' a good idea.
The HOA when you buy the house may have certain rules that you are ok with and fit your needs, BUT, like I stated many times.....they elect a new President every year and the next guy can get the whole HOA changed if he so desires and gets the votes to do so. And in some HOA's the President of the Association doesn't even need votes to change it.
And in my experience there is never a grandfather clause. what happens is the majority of the home owners, who 'news flash' most are NOT RV owners are changing the rules because they don't like them so they don't grandfather anyone in. The RV owner always looses.
To the OP: You won't have a leg to stand on. The change in the rules will stay in place and won't be able to park the MH.