I'm sure airports will really appreciate half-mile tethers, or whatever length you need for full-sized cargo planes, flopping about the runways (I assume they're aiming for full size because their little graphics doesn't show a little GA thing)

Even assuming a full size one doesn't fatigue off the tail of the lead plane, presumably any time a plane towing one gets into difficulty, the first thing they'll do is cut the towed thing free.

Also the website sounds like it was written by an over-caffeinated estate agent.