Buy a house. Rent it out. Tenants pay it off for you. It’s possibly one of the oldest side hustles in the books, right? Done right, owning rental properties can be an attractive long-term income and wealth-building strategy. But done wrong, it can be a recipe for headaches and a mountain of debt.  It’s a side hustle that I know a lot of the Side Hustle Nation readers and listeners are interested in (as am I). For this one, I collected my own real estate investing questions, and gathered more from the Side Hustle Nation Facebook community. On the other end of the line is Zach Evanish, a remote real estate investor and Director of Retail for Roofstock.   Roofstock is a marketplace designed to make it easy to shop for, compare, and purchase rental properties. (Zach was Roofstock employee #3 -- and has bought 11 rental properties of his own through the platform.)