As a landlord I can tell you there is a raft of regs you have to meet, safety standards for gas, electric, fire etc. Unless you live near you’ll need somebody to manage it for you and someone to clean. An odd job man to cope with any maintenance issues.
If you think you can cope with all that go ahead but don’t undertake it lightly.
I'm a landlord as well:
Go into this with eyes wide open.
We have tenanted properties (BTL's) in London and holiday lets (FHL's) in Kent
All are (freehold) houses or shared Leasehold Flats where we help run the building
You don't need to set up a company, but you must keep proper records of every penny collected and spent.
I used to have a policy of never running a property I could not cycle to, over the years I've extended it to not having a property I can't drive to in an hour or so.
I have a lot of family and connections in Cornwall, but I'd not run a property there for the simple reason I can't drive there is less than 5 hours.
You WILL get the Friday night 8pm call to fix the plumbing or electrics, so you need a solution (and the ability!)
I think initially if you want a holiday lodge for yourselves go ahead, and if you can cover some of the costs renting it out then dip your toe into the market, but I think the idea of running a lodge on a park as a profitable business is not realistic.
Static and Lodge parks have too many rules about maintenance, renewals, leases and usage to be even worth considering except as an occasional pin money option.
However a two up/two down in the nearest seaside resort to your home may be worth looking at