One nuke, one SSBN, and one SLBM is enough for deterrence.Historically,Albania,FYROM and Bulgaria.
But since the end of the Cold War,the only one that we've had problems with is FYROM and only because of the naming dispute and everything that comes with it. Bulgaria has become a friend and neither Albania nor FYROM have an army strong enough to go to war with us.
You actually think nobody has thought about that here? The problem is that you can't spend less,when you have an aggressive neighbor who is stronger than you,arms like crazy and threatens you almost daily in public speeches and interviews.
It works in North Korea to calm down Americans.
Imagine what would do it in Türkiye.
Besides, NATO is always babbling about how united they are, so it's not reason to worry.
Seriously, Iran Deal 2015 proved that money works better than weapons to avoid conflicts.