The average income for a hot dog vendor, working year round is about $100,000/ear. The maximum income for you, is essentially unlimited
A hot dog with bun and toppings costs an average of 50 cents
An average vendor resells a hot dog for $2.25
Sell 100 hot dogs a day you will earn $58,500/year
Sell 250 hot dogs a day you will earn $146,250/year
These figures are based on working 5 days/week, 8 hours/day.