I don't think I've discovered your family fortune. Re-looking at the 1833 record it appears that he lived in the only house in the Townland, not that he occupied all the land.
Comparing 1827 with 1857, the McShefreys, Baxters, and Wallaces occupy land in both surveys, so I suspect that they had land but not houses in the 1833 survey.
The house that Robert occupied was where this building is http://www.treanhouse.com/. It may not be the same building though.
EDIT: The house is owned by Mervyn Norris, perhaps a distant relative. It might be worth emailing him.