May I suggest the following:
-Stop spending ANY time on what aircraft type to use, use Boeing start up service etc etc
-Spend ALL your time on identifying where the passenger demand is
-Based on that decide on the right type aircraft type
-Based on that get a good Acmi operator of that type to quote you for at least a year flying (just like EZY did when they started!)
-Based on their cost write a business plan
-Based on that get funding
After a year flying start thinking about starting your own airline... If not you will fall in the pilot wishing to play airline trap....