I am accidental landlord. I used to have a tenant who used to work in Construction industry with various skills and DIY. They were good, but some times do fall behind on rent.
For first year, before they moved in property needed bit TLC, I reduced rent in exchange for painting property, some electrical work etc. and had this written contract. I had satisfaction of helping some one, and they were happy to have bigger house than they could otherwise afford.
Plan was should they were fall behind in rent, I could have exchanged some upgrade work for few months. They are minority Tenants, but possible if there is good relation.
Regards
Krishna