I don’t live in the US so maybe I’m mistaken but in my opinion a possibility could be :
Wait for a small group of houses in the suburbs to be available (preferably towards the center) and transform them in convenience stores, schools, office space, etc
Next you can link multiple suburbs like that with train/tram or metro for exemple. And you can even leave roads connecting zones for delivery or for people needing to go to another town or things like that
Couple that to a good public transport system overall and now you’re living in a space were there’s less danger due to car circulation, you don’t need to drive multiple km to do groceries, kids can walk(or commute via PT) to school, etc
Edit: Naturally this would not be feasible in a year or two but I can easily see this implemented in 5 to 10 year time
I’ll accept that maybe my vision of the suburbs is biased by films and TV shows 😅
I live in a city where temperature could realistically go to 110° F (that’s about 40~45° C for me) in summer but here bus and tram have AC and there is water fountains (decorative and drinkable) everywhere + the city try to maintain vegetation despite heat waves. So even if it’s hot outside, felt air temperature is actually way cooler.
I’ll admit this is very dependent of where you live, the climate around you, water availability and other things, but certainly it’s doable in some places of the US. For others places, in between accomodations can be found. Walkable cities are not a black and white sets of solution there’s levels, hierarchical implementations, etc