Besides do what every other restaurant historically has done and say "$20 order minimum for delivery". Also it's not 3 miles, it's 2000ft. The restaurant is literally 3 blocks away from me.
There's no need to be such an asshole just because you misunderstood my comment. You could also get in your time machine to 2010 when every pizza chain or Chinese restaurant could do this for $2.99 plus tip.