Existence is work. Driving to get food is work. Cooking it is work. Scrubbing your toilet and vacuuming, work. There are maintenance tasks all of us must do to not wallow in our own filth. There is a price to pay by not having to functionally work, but in your case replacing a roof... Cool, that's a once every 10-15 year task, what are you doing in that other time? Nothing. Maybe sitting by a fire, fishing, reading, walking around the property and enjoying your self-sufficiency.