One particularly dangerous failure mode is that people may lose the capacity to recognize when the situation is toxic, unhealthy or counter-productive. The sunk cost fallacy is a powerful thing, as are the effects of strong emotional attachment. You may want to consider having a mandatory short vacation period from the house. This will allow people to take some space to get perspective on the house.
You also may want to mandate external social supports such as therapy, external friend groups, etc.
Cults are not good at getting members to fulfill their own values. Consider the amount of cults that valued sexual purity and ended up with a whole lot of rape and child molestation.