Please tell me why I shouldn’t buy one? 
We live close to a national park in a beautiful part of the country. However for various reasons it isn’t practical to have visitors, certainly not to stay.
10 minutes drive away is a static caravan park, where we stayed while work was done at our house. We all loved it there, it has lakes with Watersports and is very quiet and peaceful.
The time we spent there (In autumn so low season) the kids loved it. Wide open spaces to play in, easy for friends to come over for the afternoon, good amenities.
Extended family live some distance away so it would be a way for them to visit when they wanted.
We could get a loan to cover the cost of buying relatively comfortably. Just struggling to estimate other costs - electricity, site fees, insurance etc.
So, talk me out of it! What am I missing?! Other than the obvious, not staying During pandemics!