No real equivalent here, though I'd say the closest non-pejorative equivalent to a "rancho" in most cases would be "homestead". Larger, more lucrative ones could be equivalent to ranches or even farms.

A "rancho" or "ranchito" in Mexico will usually be a small-to-modest parcel of land on which living quarters are built consisting initially of a one or two-room building that may grow in both size and status as the family living on it grows. There are many examples of them near where I live, ranging from extremely humble to more impressive ones. I know quite a few people here who refer to their homes/land as their "rancho".

In the context given by the asker, however, my impression is that it simply means "out in the country[side]", i.e., in a rural setting, so that's what I'd use, unless someone has a better idiom for that.

Here's a couple of relevant definitions from the Colmex dictionary:

rancho

1 Terreno relativamente extenso dedicado al cultivo y a la cría de animales, generalmente provisto de uno o más edificios donde viven sus dueños y trabajadores, y donde se guarda la herramienta, el grano, etc

2 Finca rural, pequeña y humilde, y casco de la misma

https://dem.colmex.mx/Ver/rancho