I've been following a number of folks who also moved to Portugal with the intent of buying an old plot of land and refurbishing it into a working farm for themselves [0]. As much as it is fun to imagine living this lifestyle, it is very hard work. I'd reiterate the water issue in Portugal; it can rain for a month, but it can also be dry for many more months. A water well or cistern is recommended.

[0] https://www.youtube.com/c/MAKEDOGROW