For us the idea of a tiny house is about cutting expenses. We like to travel so a big home isn't necessary, and cutting our living costs by half or more would allow us to retire or semi retire much earlier. Thuy loves the tiny homes on wheels, but I don't like the loft layout, and honestly I think most of those would pull like a ton of bricks if you actually traveled with it. Our compromise seems to be a shipping container house on a nice lot somewhere, and an Airstream to travel in.
This is the plan we are liking the most right now. Built out of 2 48' long High cube containers you'd get around 800sqft. I like the containers because your structure is ready made, durable, and relatively cheap.
Two Shipping Containers Turned into a Small House