Sorry to dampen your enthusiasm, but ‘accommodation land’ does not mean has residential planning permission. It means land used for grazing herbivores; I’m not an expert but I think it may mean can only be used for grazing or other non-destructive use, ie, may not be ploughed.
At £7,500 per acre, there’s no way that has residential planning permission of any kind. Which is not to say you might not be able to get permission to put up some sort of temporary, movable bed space, depending on justification and the locals, but I would think it would be no more or less likely than on any other sort of land at that price.
Best of luck, though, I hope it works out!