Can my dad get a new 30-day tourist visa by doing a border run to Satun?

The user inquires whether their father, holding a US passport and currently in Thailand on a tourist visa, can do a border run to Satun to potentially receive a new 30-day visa. They mention that he has already extended his stay twice, receiving one 30-day extension and a second of only 7 days, and seek advice on whether re-entering by land will grant him another 30 days or if he needs to enter by air.