500 year-long membership at $1100 is $550,000 a year. Amortize your equipment costs (which is what machine shops do) over a 10 year or maybe longer trend and it's perfectly profitable. Your monthly run cost may just be 20-30,000 a month.
There are few places open 24 hours here in the Bay and I'm so giddy about this I already sent in my money.
Those machines are expensive to fix if somebody breaks them. Can $30 day passes cover the cost?
Other than that, this is an awesome idea.