Algarve bank accounts for a retired UK expat

Hi, I have searched seemingly everywhere for the answer to my situation which I thought would be simple. I am in the process of selling my UK home. Once I have completed the sale, I want to move to temporary accommodation (hotel or short term rental) in Algarve, while looking to purchase a permanent residence. My question is, how do I get bank account without employment ( I am now retired), or without a permanent address anywhere? Can anyone help?