vacation

I have seen a lot of various threads regarding Vacation Mode, but I did not locate one that answers my question. I may have missed it so please forgive me if that is the case. Anyways, my question is this... Is there a maximum duration for Vacation Mode or can a player go into it indefinitely...

Please tell me after all the battling that this will not stop me from taking this city. That is garbage and should be changed if that is the case. Please tell me it is not. I've spent tons of troops bringing this player to its knees for him to pull this crap. Give me some good news...