Wind in the willows

I have been asked to act on behalf of a client who lives (and has lived for many years) with his wife in a houseboat.

I believe that about ten or so years ago he purchased a plot of land (about an acre and a half in size) abutting the river bank where he is moored. Over the years part of this land originally a field has been converted into a garden part into a vegetable garden and the rest remains almost as pasture or an extended grassed area.

My client's wife is starting to tire of the 'nautical' life and they are thinking of selling up and have received what seems to be a substantial offer for the boat and land. This is well in excess of the value of the boat and probably reflects 'hope' value for the land and its possible...