This is very interesting information, I would never think that it would be feasable to main BTC in Texas or i nUS in general . I tought that the electricity costs are way higher than in other places like Russia, India, China...
Regarding Tesla, no way, it is not their bussines , they have too much on their plate. The best case scenario could be that they would do something with tesla roof + btc as a marketing trick . otherwise, no way.
Texas is one of the most oil rich places in the world and that is why electricity is cheaper there. There is also a lot of winds and a lot of sun there as well so you can always get your own energy source without needing anything, when you have those type of personal energy production, you do not really care where you are because you are doing it yourself, of course it matters because you do not do solar panels on Iceland to get a lot of sun, you do it on Texas, but that is about it because if you can do it you can do it on Africa or Texas and it is the same since all you need is sun.
Texas has all kinds, gas, oil, sun, winds and that is why it is a great place to start. I believe with these type of works, we are going to see a lot more places starting to manufacture new mining equipment as well, we will see a Texas based company trying to make something that is faster and have higher hash rate.