I have a small apartment - about 540sq ft.

The layout:
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[![enter image description here](https://i.stack.imgur.com/NAQ0z.png)](https://i.imgur.com/aYZ4NbV.png)  

*Click for larger view*

The red square would be the internal unit, and to the left and right I have 2 rooms.

I also have a 6 month old little girl, so I wouldn't want a unit in her room. I'm thinking that I could have a single unit, that would reasonably cool both rooms indirectly.

Will it be pointless? Should I go for a multi-split?

More info:
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The doors stay open most of the time, and the windows are only on the right side of the building (as you see it in the picture). Each room also has a balcony, and that takes most of the sunlight. The sun enters the room usually after 4 pm during the summer.

The average temperature in the summer is around 90F, but can go up to 105F for stretches of 4-5 days.