We had 3 12000 btu panasonic units installed last October in our 2 bed apt at a cost of about 1900 euros. You can get cheaper units but in the end there was about 300 euro difference between the cheaper branded units and the Panasonic, which we were advised we're good units.
We got advice from various sources but bought from Euronics in Camposol and found their service good but when we were looking quite a few people recommended Apollo Air.
Our system has 3 inverters (fans) on the roof. When we stayed in a rental on our first visit over there was only 1 large fan servicing 3 internal Samsung units but it broke down and we know that it all had to be replaced so that put us off even considering that type of setup even if it was offered. Hope that helps.