You've got prime property there for some pretty big mansions, Voolf - mansions with towers and fancy gardens...?

If your neighbours agreed (and where you don't have any yet you could take the initiative perhaps with J.Edward's permission) you could dam the river and start a fishery. Fish would be an expensive luxury so far away from the coast and any open flowing rivers.

Just a couple of ideas.

Like with most things though, as soon as people start actually suggesting ideas a perfectly good one will occur to you straight away that is all your own