I learned to live with 3500 watts. I do not like the idea of compromising some of the functions when 50-amp service is not available. For 20-years, I have lived down here with 12/2 wiring and a load limit of about 20-amps. The "Quicksilver Express" will remain single pole.
But aside from my opinions, I would recommend putting the A/C on the same phase as other non-critical components like the electric water heater and bathroom receptacle for the DWs blow dryer. Use the alternative phase for refrigerator, electronics, and sensitive appliances. Inductive loads throw sand while playing and innocent electronics take a real beating. I'm far away from my oscilloscope and rig but a screen shot of the instant the compressor shuts off would raise the hair on the back of your neck. Microwaves aren't much nicer.