A 10MW+ solar installation costs > $100,000/acre. You can find land within 200 miles of the major cities of Texas for far less than that (and probably much closer than 200 miles). Or you can go far to the west to get land at maybe $1000/acre, but then transmission cost goes up.

If land cost ever were a serious constraint on solar, solar would have become so cheap that it would already have destroyed all the competition.