Air Conditioning for apartment advice please

Hi All,

I need to install Air Conditioning into my 2 bed apartment in Reserva de Marbella, Las Chapas. I am thinking of either:

a. A single unit installed in the bathroom ceiling being ducted into the two bedrooms and lounge area. (ducting not pre installed when built) 

OR:

b. Two units, one for the rear bedroom only and one in the bathroom ceiling ducted to the front bedroom and lounge area.  We only have a small balcony so didn't want units to take up room on it if possible.

Also can someone recommend a unit brand, such as Fujutsu etc and roughly how much each unit on average costs to run. I think the units are 2kw each.

Any advice would be much appreciated.

Neil