All those deductions are great until you realize that 40% capital gains tax on a house that’s appreciated by $300k, which you wouldn’t have to pay if you’d been living in it instead of renting it. What you’re talking about with the LLC for generating write-offs can be done with any aspect of your life, being a slumlord doesn’t have to come into play. Your corporation can literally be a holdings company. It just owns whatever you would otherwise own, and any expense related to those assets becomes deductible. You could go out to dinner with your brother and talk about how maybe you might buy another house next year, business expense. You would have to write up expectations reports every year, to prove how your business is planning to use those assets to grow, but businesses fall short of earnings expectations all the time