Well said both Cyrano and Groundhog. Groundhog is right if your proposal is for a stand alone regional operator then ACMI is not the right route. Using an a/c ACMI and then setting up a Quasi airline is very much against the CAA. Look up Airline licensing on there web-site. Really a single type is what you need too consider again depending on size will affect your costing's. Under 20 seats less financial requirement type B licence.