A word of caution: unless you have the personal skills to deal with tenants, do not make the mistake of thinking that real estate is passive income. Like any earning occupation, landlording takes attention to detail, the ability not to procrastinate, and people skills. Unlike most occupations, landlording will bring you into contact with some of the worst people the planet has to offer, under what has to be the worst possible set of circumstances. If you want to lose your faith in humanity, I encourage you to take up landlording.

There are easier ways to live rent-free, unless, as I say, you have the personal skills to ride herd on grown children or if you are lucky enough to own your property in an area where normal people rent, and you can find good tenants on a regular basis.