This doesn’t look bad, but it doesn’t look great, either. In my experience the problem with the Hesco as an interior wall is that it transmits dust. This R-house technique (see the cited website for more pictures) looks like it has the roof sealed somehow to the top of the walls.
I can’t tell from the pictures how this is a big improvement over a tent. There’s more insulation, but it’s easier to aircondition or heat a tent. For flood control it’s more economical to build a big wall around multiple tents.