I am not saying I am the only one that has all the answers, thousands and thousands of folks get how this works. And demanding I provide such a book is not that useful and certainly isn't some kind of "gotcha" defense to Ramsey's shortcomings. The book you are looking for is on the shelf right next to the book that answers definitively every elk hunting question - habitat, firearms, ballistics, tag strategy, CDW, field dressing, shoulder seasons, etc etc etc. It is right below the book that answers every question on how to find a mate and make a marriage and familiy work for 50 years. These topics are complex, but some basic tips/hints can generally applied, but that doesn't excuse botching something important like mortgages or SLs. If somebody had useful elk hunting tips but then pedantically said you could only use 300 RUM to hunt elk it would be fair for folks to point out a 270 Win would work just as well in most situations and even better for some users.
And I agree sometimes a simplified version helps some folks, but then why not make some tweaks to the simplified version so it is more accurate? In the interview I referenced he admitted his advice goes against math and finance and his only defense was that his reading of the bible was his reason. The bible is a guidepost for many things in my life but understanding the time value of money or rate of return on an investment is not an area it offers much.
But enough is enough - I am tapping out. Folks who care to take the tiniest amount of effort to understand Ramsey's shortcomings can readily do so, those who prefer to blindly follow may do so to. Apparently, it's like arguing Ford vs Chevy - it is loyalty rather than facts that drive it. To each their own.