I've been living in France, the south, for about 44 years now. I now, obviously, speak French which does help.
I am now alone and moving to a wood cabin lost in a mountain village.
Houses are much cheaper here, depending on the region. If you shop for fruit and veg, and cheese etc I the local markets, it really is much cheaper. Wine of course, too.
The temperatures have, risen over the last few years and will continue to do so, imo.
Looking around for houses to rent or buy, if you DIY you can find something from 50 to 60 thousand euros.
To rent from 4 or 5 hundred a month.
I got a Brexit visa, and the same for my driving licence.
I am in the south west now. It's not always easy to make friends you need perseverance or a place where there are other foreigners. I'm a bit of a hermit. Trees, birds, a nice view and not too many neighbours and I'm happy.
There's an enormous variation of countryside here if you have the travel bug.
I have my adult son and grandchildren in th UK, it's certainly cheaper here than there if you take all into account.
Think carefully though.