Most bad turf jobs fail underground, so judge an installer by the parts you will never see again. Ask how deep the base goes and what it is made of, crushed stone compacted in lifts is the answer you want, not turf rolled over graded dirt. Ask how the yard drains, a proper install sheds water through the turf's perforated backing and out through the base, and a bidder who cannot explain that path is guessing.
Then ask about the visible half. What face weight and pile height is being quoted, what infill goes down and how many pounds per square foot, and how the edges are secured. Finally, ask whether the price is broken out by the square foot, because a per-foot number is what lets you set one bid beside another line by line. Quotes are free and there is no obligation, so asking costs nothing.
One more Sundown-specific note: at 3,540 feet this is one of the higher townsites on the South Plains map, and elevation sharpens both sun and dry air. The fiber spec answers the sun with UV stabilization, and the dry air simply stops mattering, because nothing in a turf system transpires, wilts, or goes dormant. The yard the kids leave in August is the yard they come back to at Christmas.