Car rental in Tirana

Hi, I'm looking for a car rental company in Tirana for September. Does anyone have a rental company to recommend? I saw that it's possible to rent from private individuals through a platform that groups them (rentfromlocals/al). Has anyone used this method, and if so, is it cost-effective, reliable, and what guarantees are there?

Also, I plan to drive through the Albanian mountains (Valbonë, Kukës, Përmet, Pogradec...). Can anyone tell me about the general condition of these roads? Is a 4x4 vehicle necessary, or would a car with a slightly raised undercarriage (like a Dacia Sandero Stepway) be enough? Bruno