Business Cards

I know it’s a bit late to be scratching up something on this head, but I have two questions.

1. How many do you think I’ll need?

2. Is everyone okay with not-super-professional but fun and unique (I’m thinking of writing a different quote onto the back of each and having them be the wrong size… since that’s the size of notecard I have to print them on given the um, short timeframe… I’m a bad planner)