FIL has a huge garden and lives in a very beautiful and heavily touristy spot in the SW of England.
Realistically, how much would it cost to put one of the pretty little Canopy and Stars (glamping site) type cabins or a shepherd’s hut at the bottom of his garden that he could let out to tourists year-long?
He’s a landscape gardener, so could plant in excellent privacy etc.
Also - this is only an initial first thought, we haven’t looked into planning or anything like that.