Park Trailer Upgrades

Hi all, I have a park that is nearly 100% occupied, but the trailers are all mid 80’s to early 90’s trailers. I’ve painted a few of the exteriors of some of the park owned trailers but I’d like to improve not only the aesthetics of the park, but the quality of tenants as well. It’s about 70% tenant owned but they don’t always treat their own home well. The rules I have put in place have changed a lot, the park is far cleaner, they pick up after their dogs now, etc.

I have a few open spaces that I want to infill but determining if I should go with a newer trailer (i.e using 21st/pep, etc.) to bring in a more expensive trailer, or if I should get one of those cheaper homes (mid 90’s) from facebook instead? Obviously a more expensive trailer will look nicer, but not sure if it will actually bring in better tenants if the neighboring homes are much older?

What factors do you guys consider when determining whether to “Upgrade” the year/model of homes in your park? Appreciate the advice!