You can live in one of the houses in the connected duplex and find tenants for the other house. But you must vet your tenants well. Do a credit check and a background check. Make sure they have a steady income. Ask certain questions to see if they’ll make good, reliable tenants. There are resources online that spell out exactly how to do this right.
It may take time to build that audience that turns views into dollars. The average revenue per 1,000 YouTube views is just over $6. But with enough videos for fans to scroll through, those views can add up over time. While you're building an audience, you could also join an affiliate program related to your channel and make money through affiliate links in your video descriptions.
As for other tips, all I can say is “a penny saved is a penny earned”. If you are running out of ideas to make money, start saving. Some quick “low hanging fruit” tips to save some quick cash include – switch to MetroPCS or Boost for cellphone (I only pay $20/month), switch auto insurance to Insurance Panda ($25/month), and start using GasBuddy (saves me like $100/month at least. I drive a lot).
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.