The family not giving up their farm with sustainable solar power, electricity and a panic room to go live in a cobbled together hut with no electricity (assuming Lee can cobble together a hut) makes perfect sense. Transporting materials would be a nightmare. The waterfall covers a lot of sounds, presumably building would be okay. So now the family is living in a place way worse in every way but everybody can make more sounds. That seems good on the face of it but then the children will not grow up with the discipline needed to survive in that world.
If it were real, I can't see any reason to want to build a new place by the waterfall. If I were an electrician, that's a different story. It would be smart to set up the baby birthing station there, though. I suppose it would not have mattered the way it actually played out but it would have been smart to plan for it there.