It's not nearly as stupid as the original bungle above. The replacement family recently upgraded to a new home. They now have two kids, the youngest just went to the school for the first time on a Friday and a girl came home with him after school. He has been building his friendship and asked her to stay the night. The house originally had a master bedroom with a double bed, a second bedroom with a single bed and a nursery. That was fine when they moved in with the toddler. I redesigned a bit and added a second bed to the second bedroom. That takes care of the two kids. But there is no place for the guest to sleep.
This home will eventually be use by other sims and Story Progression seems to like kids. I knew more space was going to be needed. I added a basement (what a pain that was) with a billiards room, and walls for another bathroom and two bedrooms (with double beds for teens). That put a big dent in the family budget (already dented by the move). The budget was obliterated when I had them empty their personal inventories of all those rocks and gems they collected. After selling off the cheap ones, they were able to send the rest for smelting or cutting (including two pink diamonds-heart shaped cut). The have 17 simoleons to their name. Everything that would be sold was. I can't afford a bed (or even a sleeping bag). I feel sorry for the poor kid with no place to sleep. Oh well, when the older kid had a sleepover, the guest was up till 5 in the morning. I wish there was a way to encourage them to go to bed.
Edit: The girl guest found a place to sleep. In the boys bed while he was in the shower, she asked for a bedtime story. I don't feel so bad for her now. The poor boy gets to serial nap on the couch.
Second Edit: After the boy settled down on the couch, the girl guest moved to the love seat in the parlour.