It's not even just having the capacity...there's no risk to damaging anything in the interior from hauling things like building materials and a small utility trailer is really easy to load and unload. There is, of course, the need to store the trailer. I have a large property so that's zero issue for me, but for some folks who have smaller places or have restrictions because they chose to live with an HOA, the folding trailers can be a good solution that can be tucked away in a very small space so they are not visible, etc.