Check where the bottom of the awning arms attach to the side of the MH.
These screws come loose and pull at the molding. It doesn't have to be pull off either. Just a little bit away from wall and the water finds it way in.
Your year MH should have molding 3/4 ways down on side. This is where the floor is and the darn awning arms are bolted here to what only will be 3/4 inch particle board that is your floor.
The water runs down the side of the MH and into those awning brackets that have come loose and soaks the floor and wicks to the carpet.
Took me forever to find out where my wet carpet was coming from and it turned out to be from the awning arms lower brackets pulling away from the side of the MH.