I can't actually imagine a trailer park of Slatons. I don't think it would survive. The Slatons are the evolutionary dead end. I also suspect Ma and Pa Slaton will be the last trailer owners. The trailer it self likely isn't safe to live in, and once they die, it'll probably be removed. <Or burned down for hazard containment>.
It would however be interesting to even find out how they have that trailer. Now I hope the show ..does the ORIGINS of the Slatons. Did they actually buy the double wide? Was it just inherited through generations? It's clearly at the end. It's honestly amazing they haven't gotten in trouble if cops came over etc etc and saw how bad it was.
As an aside, despite the general association of owning a trailer with being poor, it's really not the case. The only time I can personally remember encountering the filth etc of the Slatons was a guy ended up in the hospital. Mid summer. It got pretty nasty from the high humidity and heat, and his trailer having been locked up for over a month.
Which makes me wonder how long it takes a Slaton to go from a clean living space to roach hotel. They don't even have the normal heat and humidity factors to encourage filth. I bet they blast AC non stop.