Questions: Were these lines easily obtainable or did they move to unbetable quickly? At its worst, how many units did this fall behind?
Assuming 2% here's a rough estimate. Feel free to correct me.
On average to make 100k per year you would have to get in about 1,800 bets at around $2800 per game at 5 games per day every day.
I'm not sure exactly how practical that is, but it sounds doable. Could one do this via sports betting apps and known offshore joints from home?