Marlo and Michael Aragon, who stay in Malibu, Calif., put in a shed of their yard, not for themselves, but as a classroom for his or her four teenage youngsters who had been abruptly studying at home. Ms. Aragon, 50, a stay-at-home mother or father, left the adorning selections to the children, telling them to measure the home windows for blinds and letting them furnish it. When the Meehans purchased their home in 2018, they deliberate to ultimately renovate it, but the pandemic pushed up the timeline and changed their priorities. As interest rates fell, they refinanced their home, taking …