You know, the center of western Dwilight would be great for that as well.
Just reclaim it from monsters and do it.
Hell, players from different realms can leave their lands and head west as one, doesn't just have to be migrants alone.
"Rumor has spread of a colossal endeavor: the birthing pangs of a mercenary realm, yearning for something new with which to change the scope of continental politics, dreaming of a western realm. Peasants, adventurers, and even nobles - of various realms across the world - have begun preparations for a grand exodus of incredible proportions. All of them thirsting for the exciting life of a blade-for-hire!"
