Have you actually known a waitress to make $30/ hour. Most waitresses make below minimum wage per hour (a couple years ago it was only $2.90 per hour plus tips) and plus tips, but also have to give 10% of tips to the house. At least some restaurants do that.

The only way she could seem to be making tips is a waitress or a bartender in a popular club. When I was growing up, the mother of one of my best friends made $500 a night and only worked 3 days a week as a bartender in a bar in downtown St. Louis.

Just giving you an idea. For $30 an hour, she would have to have a sturdy degree under her belt or as I said, be a waitress or bartender in a popular club.

I know this is your story, but the figures for it are not plausible figures even in an AU story built on real world situations.

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Regardless of wages earned, bills and such... it is still good. :)