kipok
Are you seriously basing a business decision on the words of people you do not know on an anonymous forum?
I truly cannot believe that you are for real, if you are I would not want to be your backer/banker!
Have you even considered approaching, for example, the aircraft manufacturers with your planned operation? For sure they, or others providing such information, will be much better placed to provide you with facts.
..... or are you doing a school project? If you are then own up and people may proffer their thoughts.