if it's $120 per contract net, it's not small at all.
and, if, as i presume, his system is aimed at capturing the larger intraday swings, then, practically speaking, there is no limit to the position size he can take.... in a word = "compounding"
eg, 50 contracts * 2.5pts * $50 * 200 trading days = do the math
and, unlike most other wishful thinking prognostications, it's entirely reasonable... provided one doesn't expect to reach that point overnight...
then again, if your name is sarasota, and you're averaging, what was it last time, 30pts a day? then his performance might undewhelm you a little...