Hey Mike! Not to blatantly self-promote on HN, but my startup Foodio (http://getfoodio.com) is based around the ideas that GrubHub's fees are insane; restaurants can't wait for their money for a week; and online ordering should promote the restaurant's brand, not a middleman. We charge $295 to build custom online & mobile ordering, and then it's just 5% of sales.
We're a small startup out of Charlottesville, VA, but we'd love to help out your mother if we can! Hit me up at rory at getfoodio dot com if you're interested.