I was hoping for more numbers in the answer.
I mean in theory you could be right or wrong....depending on a snake's size and needs. Let's say you have one adult ball that eats one adult rat per week, so 4/month. If you took a year head start on your rats, bred and raised each litter to adulthood and then froze them....a single 1.1 could supply 2 snakes easily.(because your rats would be producing at 9 per month and you would only be consuming 8 per month) If the same snake never went beyond hoppers and you had a 2 month lead, at an average of 9 per litter with zero losses, you could supply 2 snakes easily also.
I am talking more hand to mouth mentality. At 3-4 weeks my rats pups are spoken for.