I'm not in the Aviation business, so not sure what

I'm not in the Aviation business, so not sure what it would cost. Im a research guy and most of what I know about the aviation world is from research and the network connection of people that are in the industry. I'm assuming when you ask that, you mean to add a 777 instead of the 767 to the fleet? If that is what you mean, I do believe the 777 is way more expensive to buy/ lease then a 767 is. The cost I believe would be the same for the FAA part of adding the new type of aircraft to the fleet. Requiring a Mini Evac, table top, new manuals, proving flights, etc.. My hope is they start out with the 737 and add to that existing fleet to start making a decent revenue stream. After that is established, preferably add the 777 or 767 as a 2nd choice. I guess it would depend on the financials at the time.