Interior

Paneling

Flooring
Bamboo Flooring
I like the nice natural look of Bamboo which is also a very sustainable wood


Kitchen
Units
Ikea has some very universal well made basic set ups in many different colors and styles for a sensible price



Appliances

I will probably fit out the kitchen with Caravan/RV/Boat appliances as they are designed for low energy consumption and more compact size



Bathroom
All in one sealed bathroom unit


Furniture
Doubles as a couch then pulls down to a bed, very effective and space saving

another example but a display unit that turns into bed

nice looking small clean interior

sofa fold down bed