What an awesome read! You guys are going to do great. Just remember it is always easy to get another truck, TV, house, whatever. I was reading a minimalist book, becoming minimalist available on hoopla, recently and it was suggested that you do experiments for 30 days or 60 days or however long and see how it works for your family. If it doesn't work, that's fine, go back to the old way. If it does, awesome. At least that way you know.
Sell your truck and buy a little car. If it doesn't work for you after six months, you know for sure and you can go back to make a plan to get a truck again. Same with the TV. Go without one of the TVs in a rooms for three months, or the summer, and if it really makes a difference, make a plan to get a new one. Give up soda and fast food for a month and just see how it makes you feel, if you really want the Big Mac, start eating it again.
We dug out of six figures of debt with the frugal living and Dave Ramsey plan before mmm came along, but revving up the badassity with the help of this community and blog has really helped us take it to the next level. Once you start changing your mindset, your wife will join and it will be awesome! Took my husband a year or so to even consider being more frugal and another to really buy into the plan and make it his own. But it happened! Looking forward to reading about your journey!
I'll second how enjoyable it is to take apart a TV. Our Samsung LCD died a few years ago so we pulled it apart, what's the harm right? I think it was the capacitor but when we called Samsung to complain about their crappy TV, they sent a guy out to fix it with a new, larger, better part...for free. If we had just installed the old version, it would have blown again, so a guy to came out and installed the new version. He was pleased to see the TV already in pieces, it saved him a bunch of trouble! Always call, always complain, always expect better service, always think of a way that meets your needs and saves money!