mobile home parks are just like any other form of real estate when it comes to evictions and looking for properties. it is based on locations....which is the schools, the city, the area, the crime rate., etc.
good resource to start is bestplaces.net----look on their with the individual cities and make sure median home price is over 100k or around that. looking for this because the tenants of mobile home parks can't afford a stick built house, so you need a big spread in order for the park to work becuase it is a desirable area to live, and their only option is the park, so therefore you have a potential endless stream of tenants.
go around and drive every park in your city/area your looking to invest in. not sure how long you have been looking or driving thru them, but until you start looking at them all the time, to the untrained eye they can all look trashy or bad, based on stigmas....or in this case all of them could be trashy and in bad areas.