It wasn't economical for the statistician, since he was making more than he could possibly make doing this. It would likely be economical for many other people, however.
He said he could make $600/day doing this. Even if you only do this 5 days a week and give yourself 2 weeks of vacation, you still end up making $150,000/yr ($600/day * 50 weeks/yr * 5 days/week). That's well above the national average for both the US and Canada.