2nd AC in bedroom or garage if using for sleeping?

My Rig came pre wired in the Garage for a second AC (50amp service) I added a 11k non ducted unit. The main unit is 15k ducted. For me If I had kids sleeping in the garage and I could only have TWO AC's I would put the second one in the garage...

It was my understanding that to have two AC's you needed 50 amp 240 volts which can be split into two 110's. One AC on one side and one on the other.

Just curious how you hook up 3 AC's that can be ran at the same time on a 50 amp service?