Vedic architecture from India (’Vastu’) states that the doors of the house should face East (rising sun). If not East, then North. This is considered the best place for optimal functioning of the mind and body.
Doors facing West (opposite the sun rise) makes the inhabitants old and sick much faster, and a door facing South is said to bring bad luck and misfortune…
Toilet Tank top Sink
Very popular in other countries. Requires a flush toilet. When you flush the water runs up into a faucet and sink that sits on top of the toilet tank. The water drains into the toilet tank to be used with the next flush.
Portable Bathtub
There are a number of portable bathtubs that can be easily brought out and used. Then drained and put away.