Mrs Fish and I are building a new house. $600,000. I'm turning 65, ready to retire. A 15 year mortage may be available for a little as 2.5% at our local credit union. I will have $400,000 from the sale of our old place. Do I leverage this low rate and take a bigger loan or do I put the whole $400,000 down? Real-estate here is on a tear, they are already selling the same house we are building for 5% more than we paid and they are going like hot cakes even in this pandemic. What do you think investing mavens?