"It's moo."
For what it's worth, I've never been a fan of them living in that house. Whenever I watch reruns, and I see her in that same bed with either Teddy or Luke, it just doesn't seem right. I would be all for them moving into a new house, one that is theirs. And also, they really don't need all that space anymore once the girls have moved out. Which, in this case, is happening sooner than they thought.
But I agree, budgeting wise it makes no sense, so probably won't happen.
I do wonder what they will eventually do with Deacon's house. If (when) Scarlett and Gunnar finally become a solid thing, I bet Scarlett will at one point move into Gunnar's house.