Some great replies and interesting thoughts, thank you.
We only live 7 miles away so will manage it ourselves and do the cleaning and handovers. Im a very practical person so the maintenance side of things wont be an issue. It is coming with the maximum lease given by the site owners, 99 years as it will be renewed by the sellers before completion.
We actually looked after a chalet on the same site last year for an owner (cleaned and maintained) and got to know a couple of other owners of chalets they let, and turn over of customers seemed very good, lockdown permitting!
i think air bnb may well be the way to go, there are 4 on the site from our location and looking at the availability they all seem to fill up well, obviously standing out from them will be our priority, which we have some ideas on, but not forgetting it is a holiday let and not our main home. Site fees are pretty reasonable at £2100 so compares favourably with some of the bigger sites around. As for depreciation, looking on rightmove of previous sales, since 2015 prices have actually increased by some margin, so hopefully depreciation wont be too much of a problem.
At the moment we are living off savings, so although we dont expect it to repay us a 'living' wage, a few hundred here and there will be most welcome to suplement our savings.
Please respond with any more thoughts, positive or negative. And if any of you fancy a few nights in North Norfolk, it is only 7 miles from Cromer, and 15 miles form the beautiful broads, you know where i am.