I think you need to hire an organizer! The fact that keep buying stuff because you can't find it is my indicator. I have never done this because I hate clutter and try really hard to keep things organized. I would ask around other moms, local facebook pages. I know I have seen numerous ads here and I live in a small town. It's important to have a system and follow it, and get the kids to follow it. My daughter is really organized and it would really stress her out to live in clutter. Perhaps you could take a couple of days off and work with the organizer to get things set up, then have her come over weekly for a while then monthly for maintenance.