SAGE! I am so glad to hear all this news from you. It is clear from what you write that you have a lot of DB principles ingrained in you--you recognize issues, you look at what you can change, you have a plan, and you're tracking your progress. I don't have kids myself, but I know that that's a huge stressor at times. Keep doing what you know you need to do, and cut yourself some slack occasionally.
Re. cleaning: would you ever consider a cleaning service? Maybe once every month or two? I'm thinking of my yard as I type this. If someone would come and just do all the big work for me once, I could maintain it after that.
Decluttering is different--more personal. For me, if I focus on one spot at a time, I can do that well, and I can see the difference right away, which inspires me to move on.
Would H help in this? A family effort once a month, maybe?