Any way of Ottomans successfully keeping Hungary ?

So Suleiman the Magnificent conquers Hungary and decides that's as far as he or his heirs will succeed going north. What was necessary to keep it? Some sort of net of vast military fortifications and giving locals such rights or benefits no monarch of the time would give?
Border with PLC would maybe be a bit easier to defend since Carpathians are there, and that would leave only Austrian one, but again my question arises.
 
Well, the resources spent on failed sieges of Vienna might be useful in keeping control if the Ottomans decide "this far and no farther" and stick to it.

However, in the long term, the Hapsburgs and the Persians are going to be a problem whether Hungary is held or not, plus there's the inflation brought about by the New World gold and the Europeans going around the overland routes the Ottomans controlled.

Maybe if Hungary goes Calvinist under Ottoman protection and fears the return of (Catholic) Hapsburg rule, the Inquisition, etc., they'll become especially loyal to the Empire.

Perhaps the Ottomans use the Calvinists as soldiers (in a break with the usual policy of not having Christian soldiers, with the possible exception of the "bash-bazouks") due to their (probable) anti-Catholicism and loyalty to the state in face of a possible Catholic massacre if the Hapsburgs took Hungary.

You might want to ask Abdul, since he knows a lot about the Ottoman Empire.
 
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