It seems to me Makani's problem is they wanted larger scale power generation, and of course can't rely on constant wind, so needed a way to settle and recover. Of course that's not a problem for smaller-scale builds like the OP.

This is one of the best videos on Youtube. I really liked how they documented their progress. If only the video lasted longer.

Very good documentary on the project. It's amazing what you can do with basically an unlimited budget. I worked at a much, much smaller kite power startup that folded soon after Google stopped funding Makani (investors lost interest because they figured if Google wasn't funding in this space it must not be viable). Anyway, looking at that documentary it seemed clear that Google must've poured hundreds of millions of dollars into that company over it's lifetime. So many engineers and so many resources. I was kind of envious, but then again the ready funding might have been part of Makani's downfall, you're forced to make different design decisions when money isn't so plentiful.