Deal
Sam didn't bother to look at the rest of the nobles.
Today, he has two reasons to invite them all over, one of them is, of course, to announce the opening of the school and the other thing is to warn them.
Soon, the situation in the western continent will change, he has at most a year and a half before the major associations and possibly the whole six major powers. And this is a conservative estimate.
If they could find Sam's next course of action then they would come and make a move earlier.
No matter when that attack happened, Sam is not worried about taking them head-on. He has many ways to survive. If push comes to shove, all he has to do is escape and start it all over again. He might not be able to make another business of this scale on the planet.
But he can still make do with it. He has loads of money at this moment, he doesn't need to do anything. At this point, the organization and institute are for developing his own force.