if its on the coast
loads of baked on bird mess ( esp as it will most likely be at the start of the season and then again middle of summer and that will be it )
the salt can be unforgiving
as for price, even though they are a caravan, they still have a fair few windows, the last static i stayed in had :
windows all around the front of it, like a shop front really, kitchen window, Bed 1, 2 and 3 , bathroom / toilet, entry door and then next to that at the dining area