With hard work !

The ages of Thomas + margaret tend to be consistent between census and proable burial records
Thomas born c.1790
and Margaret c.1788
There is a bapt of a Thomas Corrin eldest son of John Corrin + Ann Cowle bapt Mal 1789 which agrees with his stated birth parish

Margt is also noted as born in Malew but a quick search finds no obvious contender though there is one in Arbory

Fishermen are not generally noted for wealth but if he owned property (a small cottage in Derbyhaven) it may well be worth traceing this in manorial Rolls (films via manx Museum or LDS Fam Hist Centres) - pre 1800 it should be worthwhile checking wills.