I think you are correct @PierreB
There is nothing about network kite designs
Such as the rotor you propose or other Network Kites and Daisy network kite rotors which prevents the driving elements of a rotor scaling… as long as they can fly reliably.
The gigafly and mega fly modular parachutes which use multiple units side by side could be a good guide to establishing super wide multi unit kites.
Wide tethered kites are stable whether the elements are large or small
apologies I don’t remember the correct accreditation for the following photo
