Build a fence, with rent money?

[Joshua D.]

so the renters want to build a fence in the backyard of the property we own? The backyard needs a good fence badly so this seems cool. However they just asked if they put all the labor could they subtract materials from rent?

Has anyone had renters do improvements on the property this way? will it go well in the end? If i do this deal is there a better way to write it up.

Thanks in advance from a newbie...