I wanted to buy an apartment in Lisbon (I speak Portuguese). Forget it. You don't get anything decent below 500k (speak Golden Visa Program). Big chunk of change for a comparably poor country.
"visa issues"? Portgual is Schengen. You need a residence visa if you want to live there. Possibly but far from trivial. On the other hand, if you want to buy real estate anyway and can cough up 500k you can go the golden visa route.
You may be too late for Lisbon. Also, Overtourism becomes a problem.
Braga sounds interesting. Had not time to go there. Wanted to check out rafting. Also, summers may be milder.