The Turkish option is based on a proven platform (the T-129A, what is being offered is the T-129B), so it would be far more reliable than the Z-10. Financial issues may be the only reason why PAA goes for the Z-10, but even then, they'd rather go for the US option (who've said that they'll loan the $200 million to Pakistan). If the Z-10 is bought, it will mainly be due to politics, and then finance.
Also, I should also mention the less likely, but still more probable than the Z-10, the Russian offer of the Mi-28NE. Right now, PAA is evaluating it's options, this is one of them. It has yet to make a definite decision, and I predict that it will still take at least another year before we hear any news about a potential large scale acquisition of attack helis; It'll take another year after that for Pakistan to be in a position to actually make the acquisition occur.