It's not exactly "passive", but I make about $16k renting the bottom floor of the duplex I own. It's not without headaches of having to deal with tenants and m

It's not exactly "passive", but I make about $16k renting the bottom floor of the duplex I own. It's not without headaches of having to deal with tenants and maintenance and whatnot, but since I live there anyway in the upstairs, it's primarily things I would have to do in any case. And I can write off a lot of interest and tools and materials on my taxes. It pays the mortgage, if not the taxes, and should be a nice little income property down the road when I buy a real house. I also make about $100 a year on Amazon affiliate links on my blog.