Here's another question:
How many people actually think this airline will survive?
There have been a few airlines that have tried flying out of Hamilton in the past, but have been unsuccessful. (I can't remember the airlines though). Hamilton seems to be very good with cargo companies - UPS goes out of Hamilton, to name one, and there are many private planes going from Hamilton, but how many people will actually fly from Hamilton, when they can just go to Pearson International, which is only about an hour or two away by car.
Personally, I would prefer having Westjet come to Toronto's Pearson International than have a new startup airline out of Hamilton, although I will not mind if they would start flying from Hamilton, since it would be really good for the city to have an airline of their own.
I think that if this does go through, they would probably use either 737-200s, or DC9s.