Intamin's X

In the past few years, I've seen hour and a half lines for every coaster at SFGAm except Demon, Iron Wolf, Spacely, and Whizzer at least once.

That said, length of line is hardly an indication of popularity...

-Nate

I know cost can vary a lot, depending on many things. What I'm wondering is how much would a flyer cost when compared to a similar sized inverted coaster? Are they a lot more expensive, just a bit, or about the same?
I feel like it might be a lot of extra cost to medium/small parks, with not very much more draw than a good inverted coaster would have.
...IMO

Cost of Tatsu per foot - $5830
Cost of Air per foot - around $6533

Anybody know what the monetary investment was for the 3 Supermen at SF? RCDB doesn't list them.