They have a fairly modern air force that includes F-15’s and F-16’s. I don’t think they have any heavy bombing capabilities though.
Seems to me, it wouldn’t take much to destroy those artillery sites. Just a matter of giving the orders.
I am not expert but I would think NK has endless batteries of cheap artillery up and down the border.
You would have to carpet bomb the whole border at once.
NK Korea just shakes down SK every year or so. The whole thing is pathetic. NK can hold SK hostage forever.
The South Koreans have a very high standard of living so the last thing they want is reunification. Some people thought West Germans were self absorbed and materialistic but they took a lot of pain reunifiying with lots of taxes.
The South Koreans are not as charitable. Even though East Germany was a mess - it was light years better off than North Korea. The SK are more selfish than the Germans.
Their F-15K models is very similar to the F-15E which can carry quite a load.