Pakistan don't have money to buy advance jets and PAF have closed its modernization program due to funds, some how Pakistan have managed to get the deal done from its most tested ally and friend for purchase of subs which are very urgent need of PN as they have only 3 subs with good life in them others are just on steroids and have served their life. Therefore GoP have to manage this deal somehow. I don't think PN will go for U-214s after this deal of 6 subs even if they have money available to them, because PN is also in need of nuclear sub which is expensive to built and operate.