stock allignment is only $50 or less.... if you have a camber kit intsalled, it costs a bit more.
you can drive as long as you want with camber but it'll eat your tires and it'll wear out premature... longest it'll last is 6 months probably. it depends how much tread of have left and how much camber.
i'd say you're good to go until a month, but its still risky, your tires can pop
btw did you bend the excess metal under the fender linning? if you take off your wheel... stick your head under the fender and look up... there's like a 2 inch strip of metal pointing downwards like a knife... and everytime you hit a bump... its gonna cut into your tires. this is a must do if your car is low