I don't think this is a good idea.

Introducing an area of FT for personal gain is not what FT is, in my mind at least, all about. There are dozens and dozens of places on the internet that cater for holiday rentals, FT does not need to mimic them. Swap for non-commercial gain would be different, although a new forum just to cater to the likely number of instances of this happening, seems overkill.