If you plan on towing your Tiny House, you NEED an anti-sway weight distribution system. This is the one I used to tow my house 25,000 miles. It helped redistribute my heavy tongue weight, easing the load on the hitch. This system also allowed for less sway when going down the highway, which can otherwise be alarming with such a heavy tow load.
If you need to calculate the weight of your Tiny House, click here for a detailed how-to article.