Why not think of an alternative solution?

For example, try to see if you can install slim cascade split AC units in the rooms in the middle of the ceiling. I have installed Mitsubishi slim cascade split units that are only 15cm thick. These don't take much space...

For the condensing units, try to make a place in you veranda for a big condenser to cool 2 or 3 units simultaneously. This can be controlled through a small controller with the system. After all, you will rarely need all rooms to be cooled at once.

If you need, say 4 or 5 units per apartment, the total cost would not be more than 25,000 QR including installation and commissioning.

It would save you a lot!

Of course, if you can get a permit to install all condensing units on the roof of the tower, then that would be a better solution, but the lower the flat in the tower, the more it will cost...

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Obstacles are what you see when you set your eyes off the goal.