Perhaps a version with a lifter kite could allow a workable rope-drive system?
WO2017153686A1 - Eolienne aeroportee - Google Patents (Kitewinder, Kiwee) indicates a problem when the pulley guiding plan (here around the Savonius or Darrieus rotor) is perpendicular to the axis of rotation. Here this problem is not solved with the addition of the lifter kite. The same for the device sketched on Flettner balloon and VAWT side by side - Engineering / System Design - AWESystems Forum.