ok yan! i think for a family with 1, 2 kids, or for a couple nearing retirement on limited budget or overblown budget even, if you bought cheap land somewhere in the countryside, cheap electricity
/accessorize solar panels even potable water, put up insulation panels,wirings etc and ac(solar)
using two 40' container vans at 29sqm, i guess when the time comes ,water fills up the earth, lulutang yan!!(joke)