I am looking at building a tiny home or an ADU on my double lot to get some extra rental income. I have a space that is about 20 by 30 feet and I am open to using a simple cement pad or an above ground setup. My main goal is to make the unit self sufficient so the tenant gets their own bills for water and power. I want to avoid connecting it to my primary house lines if possible. But I am not sure if it is better to go with solar and off grid plumbing or pay the city to run new pipes. I can do some of the work myself but I plan to hire professionals for the big utility connections to keep everything safe and legal.