SS- Started collecting at age 62, my then 10 year old and newborn started collecting as well. When I hit FRA I will cancel mine and the kids will continue theirs. At age 70 I will reapply for the higher benefit as my wife is only 36 and can probably use the higher survivor benefit.
MTGE- retired at 33 with a large mortgage, offloaded that in a divorce years later. 2001 took a liars loan for $300,000, flipped it 3 years later and moved to Peru. 2005 took out a 4 year builders loan at 14.5% interest for a rental apartment that was returning 32%/year. Paid that off when I was able to get my money out of the USA.
I live in one of those weird places where it is cheaper to rent then to own. I have been renting for the past 13 yrs and it is great when the USD is strong and not so great when the PEN is strong. On balance it was the right decision at the time. Right now I could buy my 3 br/2bth apartment for $220,000 but my rent is only $787.50.
Thank God for dumb tourists!