Watch other people’s kids along with your own. There’s a good chance your friends who work outside of their homes would be thrilled to have an experienced parent watch their children while they are at the office. It can be manageable if your friend in need has only one or two kids. Plus, the new playmates will help keep your children occupied for a few hours. Pay varies widely based on where you live and the ages and number of kids you'll be watching, but babysitters and nannies typically can make up to $10 an hour in small cities and much more – even double that hourly rate – in larger cities.
Research other listings in your city on AirBnB and see what the going rate is for a place like yours. You could also just rent out a private room as well or even a bed in a shared room. In fact, that's how AirBnB got its start. However, you might find it hard in the beginning without reviews, but as long as you take really good care of your guests and provide a lot of value, the reviews will eventually come rolling in.
How much will you make? I think my best month with Google AdSense was almost $5,000 over the last ten years. That amazing month blew my mind since it was actually near the beginning of my blogging journey. When you go from making zero to $5,000 in a month, that will rock your world. For me, it also got me even more excited because I knew there were other ways to monetize.