The other one that i saw was this. This one is in Detling, has 7 bedrooms, 5 cellar rooms, 2 loft rooms, plus a whole host of reception rooms. It also has, for an extra cost, some land that has planning permission for a number of large houses - see here.
I think i still prefer the idea of building from scratch, but in terms of getting planning permission, i think an old farm with lots of old farm buildings might be an easier option. I think that the farm in Headcorn could have this. It clearly already has a precedent for camping, and i think it comes with a river. Ticks all the boxes??? Well, it ticks my boxes, but then i've probably got a whole load of different boxes to everyone else. What we probably all need to do is to each write a wish list. It should include 'negotiables' and non-negotiables'