Then find a way to do it with a CTO.
not to beat a dead horse here, but - you only need one person to run a CTO, don't you? A takeover is run by a single large unit - other units simply help it along.
I'm not sure on the mechanics, but I thought the region automatically became a new realm, called "colony of Realm X" and the TO unit's leader became the new ruler.
other than being a bit more challenging because of monsters, how is this different from simply buying the region?
I realize the point is moot, but I would like to understand the mechanics and thinking behind this all.