Zoi households are stuck in the city you select without being able to visit other cities unless you relocate.
This is really annoying. Travelling to another city is only for rich Zois as you need to have enough money to purchase a property in another location and you leave the storyline you have developed behind. You basically start from scratch.
Would be cool if you were able to go on vacation to other cities without having to full commit to a whole new storyline. There could be vacation rentals options where you could select the duration of your stay. Also allow Zois to select who they travel with.