@idiot Now, if you wanna play with exponents, you can make it entirely untenable in a big damned hurry. Just have it start at $1,000,000 for the first 30 days and then it goes up by 10% each day thereafter, compounding.
That'd be well over $300,000,000 after 90 days, and tbh I could probably put up with a superprison for 3 months for that sort of cash.