I really wonder how he racked up $561k in dental school loans. That's over two times what google tells me it costs, so I'm really wondering what's the missing story here. My sister and her husband wrapped some student loans into their house loan, and then they persisted in believing that their house was hugely underwater (and it may have been underwater, but to know they'd need to remove the student loan amount from the equation). I wonder if something funny has happened here too, either with the math, or perhaps starting a different career and then restarting dental school?
Agree with therethere on variable being risky to do the whole loan as variable. I too maxed early loan payments on my 8.5% loans instead of my 401k, which would have reduced my tax obligations. Not the best move. (And to compound it further - when I did start contributing, I did a Roth 401k despite the fact I knew my salary was likely to be less in retirement than now. Just had been taught that Roth was *always* better.)