As others have said, if you're flexible and not insistent on exactly recreating a suburban US, SFH, car-centric lifestyle, there are many places outside the US, where you can live a very high-quality life for MUCH less money. Airbnb is a great way to try it out for yourself, first, before you buy anything, or even worry too much about researching visas or long term anything. If there's a city anywhere in the world, you've ever daydreamed about living, just go on Airbnb, find a nice apartment or house there, and book a month long stay. If you like it and want to stay longer, book another month or two. Most places in the world, Americans can stay up to 90 days without the hassle of visas, residence permits, or anything, really. I highly recommend doing this FIRST, before worrying, at all, about arranging anything long term.
From 2016-2018, our small family of 3 visited around a dozen countries, spending from 1-3 months in each country, usually in Airbnb apartments or houses. For example, we spent the month of March, 2018 in Athens in a beautiful 2 bedroom apartment, with a huge formal dining room, a den/office, fully equipped kitchen, giant lanai, in a great, walkable neighborhood, with coffee shops, restaurants, etc., all within easy walking distance from our apartment, reliable high-speed wifi, AC, etc, for only US$700. In April, 2018, we lived in a smaller, one-bedroom apartment, with a fold out couch where our daughter slept in the living room, in Suresnes, a suburb of Paris, for US$950. In Asia, we lived even more cheaply. Spent 2.5 months in the small UNESCO World Heritage site of Hoi An in central Vietnam, where we stayed in a wonderful, small, family-run 'homestay', with a beautiful pool right outside our door, free bicycles, delicious, cheap coffees whenever we wanted them, for only US$500/month. In Hoi An, since we had no kitchen, everyday, we ate out for breakfast, lunch and dinner, and, still, we struggled to spend >US$1200/month, total, including rent for our hotel room and all meals and activities.
When our daughter goes to college, DW and I are looking forward to slow-traveling the world again. Used to think we'd like to actually live in another country. In our experience, though, being able to book 1-3 months in a city is better than living there. After our experiences in 2016-2018, we're more of the mind that there are seasons that are great to be in some cities/countries, and there are seasons when we would prefer to be elsewhere. For example, Japan is wonderful in the spring and fall, and can also be nice in the winter, too, especially if you enjoy skiing. Whereas, I'd rather not be in Japan in the summer. YMMV.