Interesting comments I asked because I've heard it mentioned a number of times that f18 is so much cheaper (australian buy suggest otherwise mind) yet from what I've seen/read a similar exercise to the f35 kpmg 42 year costing has never been publicly done for f18. I don't see the us navy operating f18 for as long as Canada intends its next fighter to last and that must be a consideration in thru life cost also where the jets are in there development life cycle.
If they wanted a twin engine jet for homeland air policing with decent alround capability typhoon would be a better fit it will be around for some time cant see them buying European though.