I don't understand why they cant dig some kind of trench or mound to put them on at least, to angle them more towards the sun. There's plenty of agricultural equipment designed to cultivate soil (first example I found[0]). That could take care of the drainage as well, although I don't know how much it rains in Texas.
I think using the dirt that's already there and building the structure with some kind of machine would be cheaper than having someone mounting them on a steel rack. See for instance large potato fields [0]. The point is instead of putting them on flat ground, make the ground have a better shape first.
The racks are really easy, well known technology. That was my point. If you're going to give up the entire reason for laying them flat on the ground, you're going back to the way existing solar farms work, so just use the same proven technology.
[0] https://www.asa-lift.com/asalift/producttypes/bodenbearbeitu...