What visa options does my brother have to avoid potential entry refusal into Thailand after multiple visits?

Just a question I hope some one can answer . My brother flew into Bangkok this afternoon. Officer at immigration said he could refuse him and send him back to uk, as it is the third time since January he has come into country.. He is 57 years old does he have any other visa options, as may encounter this problem when he comes in January, his normal time in country is 60 days. Thank you for any advise anyone can give