I can recommend Carolina place to stay in Malaga for short-term, it’s around ~ 30 min on foot from city center. You have heating and conditioning in main room, and bathroom accessories what your need: shampoo, shower gel, etc. But if you plan to work in the flat, it can be a little noisy in the first half of the day, because the apartment is on the first floor and the entrance to it is from a fairly lively street.