Two wars at once?

[dwa]

Yet NK actually has a somewhat capable air force

You mean large. NK has very few fighters that were not made in the '60's (and by very few I mean can be counted on two hands), and have been suffering from major supply shortfalls for quite some time. I can't remember the last time there was a significant training exercise involving their air force.

Yet again, NK has much larger (effective) army

Once again, the two terms are not interchangable. The only capable parts of the North Korean ground forces are their longe-range artillery systems, namely the 170 SP gun and 240 MRL system. Which are certainly nothing to laugh at, but are not enough in and of themselves to succeed in a conflict.

A telling point: there is nothing their ground forces have aside from heavy artillery systems that can penetrate the armor of an M-1 or K-1 (Korean version of the M-1, about 85% of the size) tank. Nothing. Not anti-tank missles, recoiless rifles, tank munitions, nothing.

Furthermore, if there will be war in NK, it is quite possible that it will be a lengthy one.

I would say "replace quite possible with a minute possibility", but even that is going too far. The North simply does not have the resources to sustain a protracted conflict. Only if there is Chinese military intervention again can there be a protracted conflict. If the North Koreans do not cross the Han river in less than 30 days, or completely annihilates CFC forces in on fell swoop, it's over.

At least you got the last point correct, I'll give you that.