You assume, wrongly, that cost is the issue. Lack of understanding of turbo systems is a big issue (there's still a long way to go towards getting the bolt-on tuners educated about forced induction, but it will happen eventually.) There's a bigger reason however:

All Crossfires on the market are less than 5 years old. A lot of cars are still under the original powertrain warranty . A lot of people are waiting for their original warranty periods to run out before putting big power out with their cars.

I expect to see the first big run of Crossfire tuners hit in a next two or three years. We already know that the stock engine has forged rods, strengthened crankshaft, and piston oil-sprayers. Stock, it can take 0.5bar/7.5 to 8psi boost with a proper 11.5/12:1 AFR tune under boost. With an intercooler and a properly sized turbo, the projected theoretical power at this pressure is 330hp (at the crank).

I'm basing this on M113 tuning information as well as my past experiences with turboing stock honda engines.

Another thing is that the real challenge is actually fitting the turbochargers into the engine bay of the Crossfire. To be perfectly honest, the Crossfire's engine bay is barely big enough to fit the engine itself let alone a turbo. As posted before, there is the option of a remotely mounted turbo. From a packaging standpoint, it makes sense.

In any case, money is not the issue.