When we were building recently.....I got a loan for 2.75% with no other fees. Just short-term (2 years) but it was a mortgage and I was able to deduct the interest costs. After taxes the loan cost was under 2% to me. Yikes.....what I would have done for a rate like that in my youth! I did get some 7% interest money.....but rates got ugly after that.
Big swings in USA economic situations.....and you gotta find a way to be on the "right" side of the swings. Lots of leverage has NOT been my friend. I've had home loans.....but kept biz loans to a minimum. Working hard, just to pay the interest, is not schmart IMO.