The OP seems to have spend like $3000 for a month. What's very puzzling to me is why not go to a decent hotel? I'm positive that you can easily find 3 and even 4 star hotels for less than $100 per night in Portugal.
This question is not specifically about the OP but in general about people that pay so much money for an Airbnb when they can have a room in a nice hotel for the same (or even less) money. I'm not talking about special occations (i.e people that want to organize party and stuff), I'm talking about traditional tourists. Why would anybody choose an AirBnb vs a hotel?
Maybe I'm not in the right mindset (or age?) but I've never even considered an Airbnb when going on vacation anywhere.