I am not a restaurant owner, but have spent many years with friends who are in the food business - chefs, owners, food truck operators, etc.. I even considered opening my own fast-casual establishment. My perspective is this: While taking a "leap of faith" is critical, that faith should be based upon an extremely well supported business plan. After all, as you know, opening a restaurant is opening a business. You need a very strong understanding of all aspects of that business: choosing a location based upon solid data, identifying the type of customers you want to service and type restaurant that you want to open, analyzing your competitors, forecasting likely sales, managing costs, establishing and managing a strong marketing plan, etc. Your leap of faith should be fully supported by a very strong business plan.