Foldable house. Plan to build one here in our garage in Dhaka and then transport it to our home residence hiring a truck. It might not last long, but cheaper and DIY fun.
But that's still a plan which never might get executed. There's priorities in life.
But here's a business idea. If someone can design and build one such with delivery on site promise, he can make a living.
Everyone in this pandamic is rushing to the village and not everyone in city has a livable home there.