Why did the Avro Arrow lack Foreign Buyers? main reasons?

Question

Why did the Avro Arrow lack foreign buyers...what are the 3 main reasons...

and why was the avro arrow a stragetic shift in the west (3 main reasons)

and why did the escalding costs rise (3 main reasons)

Answer 1

The Arrow was designed specifically for conditions prevailing in Canada. The most important was long-range bomber interception from sub-Arctic bases. This drove the size (for engines, and on board fuel) and the relatively short-field capability. Other buyers would've been primarily NATO countries, where the short reaction times, and temperate climate, made the Arrow almost too much aircraft for the mission.
The strategic shift was the move away from concentrating on bomber interception, to ICBM/SLBM deterrence. The Soviets weren't really serious about bombers anyway, the "Bomber Gap" was a figment of US intelligence imagination. (It is actually a classic example of "mirror-imaging". A tendency to see and evaluate adversary's actions in terms of what one would do.) Consequently, as the US pulled funding out of air defense, it didn't make much sense for the RCAF to be dumping money into a program, the leading superpower doesn't think is worth it.
Costs escalated, IIRC, due to the advanced engines and controls, the new radar and EW suite, admittedly about 15 years ahead of its time). Finally, the original cost estimate was based on a larger production run. Fewer jets, the price goes up-this is not unlike the F22 program in 2007.