I put mine over 10’ high on the roof:
https://community.tempest.earth/t/photos-of-sky-and-installation/132/193
and have no guy ropes. I admit I wasn’t sure it would last but it has so far through high winds. I imagine it’ll fare well enough in our strongest winds, and the biggest risk it faces is with strong winds and heavy turbulence (gusts).
But it is on the roof and nobody will be pushing on it, falling into it or such, it’s only wind it has to deal with and as it’s not a sail, nor carrying one and has a very modest profile it seems likely to last. We shall see.