Looking at the direction the joists are going, there is no place to put the motor in the ceiling as the motor cavity would have to be cut into the joists. The motors will have to be installed to the wall above the windows. Because the windows go right to the floor, you can't install the motor at the floor and pull up either.
So, somfy 110v motors mounted tight to the drywall ceiling look like the least obtrusive option. You will have to get a quote that includes the fabric weight to determine what scale motor / drive tube
Sonesse® ULTRA 50 RS485 looks like it might be applicable without doing any measurements or calculations. Which means 110 volt and control cable would be required at each motor location.
You also would need to determine if the top bank is on separate motors than the lower bank.
Will there be any other window treatments? Valance above that could hide the motor / tube / fabric? Possibly there is a ledger board going across the top to hide all the motors? Does your architect have any thoughts?
Is the shades for light control or privacy? If privacy - maybe you only need the bottom windows to be covered? My home has a 37' tall bank of stacked windows...since it doesn't face homes (like yours), there is no need for shades.
Strong suggestion is to hire a somfy dealer to help you with this (or Lutron etc). The next level of decision requires research and work to calculate what you really need. Looking that the framing of the house looks done, and it looks like they are putting brick on the exterior (scaffolding...) HVAC and electrical are next up and will come quick.
Last edited by smoothtlk; 01-22-2019 at 06:50 AM.