[eropple]

Sorry. Restaurants serving food fit for human consumption don't scale.

You essentially need a completely new staff--including a completely new creative staff. This is important, and a large part of why most chefs who own multiple restaurants generally have fairly diverse properties that present different menus. But diversification still requires wheelbarrows of money; "the fastest way to make half a million dollars is to start a restaurant with a million" probably applies even more acutely to opening more than one.