Some of the main reasons why tiny homes are so popular is is affordability (tiny homes cost a fraction of what the average home costs), relatively low upkeep costs, and decreased maintenance. Some other reasons include environmental friendliness, simplicity of living, and mobility (if it has wheels).
Lower expenses, no mortgage (you buy outright), freedom of movement, lower energy use, easier maintenance and less cleaning, ability to be immersed in nature, and simplified life.
There are 124 Tiny Houses in Lewis County, WA currently.