In my opinion, sadly the majority of residents won’t file the title no matter what you do (they’ve lost it, don’t want to the pay the fee, lazy, etc). If it’s a really classy park maybe this one will be different though.
I personally wouldn’t be very concerned. Let’s say a resident never filed the title, and 8 years later the home gets an electrical fire and someone gets injured. You won’t be anywhere on the title chain (only the previous owner would) so it seems difficult for anyone to pin blame or liability on you. I’m no legal expert though, and I would talk to an attorney about the situation.