Oh, you mean "purchase" jets for just 10 years?
Obviously not gonna happen. You are paying full price already. 30 years is the minimum you gotta use anything you buy, since that's how maintenance is scheduled. Post 30 years is when sustainment prices begin to hit the roof and you can get rid of it then, no different from what many European countries do.
Post 10 years transferred to IAF.
Anyways what u mentioned holds.
Experience gained using Rafale M cannot be wasted.
Transferring to IAC 2 catobar seems logical.
While tedbf for vicky + IAC 1