Being "equal" isn't necessarily "fair" in this instance.
In a family with a ton of kids that is struggling financially, or so they say, why would you need a home with five bedrooms, a wet bar, french doors, etc, when you have one child and she will be going off to college within the year...just to feel equal? I'm not saying Meri should live in a bare bones one bedroom home. Not at all! However, her decisions/choices have shown her true character, imo. The additional expense to the family is just not practical or necessary....especially when, of all the wives, she was the only one going over the budget when there's no real need for the additional space/rooms/extras.