I've become increasingly interested in the idea of adding a porch to my tiny house, but also increasingly obsessed with using as much of the trailer as I can for indoor space.
So, I've talked to a few people (designers, builders) about adding a porch hanging off the back of the trailer. The word they use is cantilevered. From a building/engineering perspective, this would be really doable.
My concern is about the trailer. If I have a 3 or 4 foot porch hanging off the back of the trailer, what is my risk of that porch bottoming out as I drive up a steep hill?
Does anyone know what the guidelines are? Is there a general rule of thumb, or is it something I'd have to discuss with the trailer manufacturer?

The only house I've seen that has done this is the ProtoHaus, but it doesn't look like they went beyond the trailer by more than 1 or 2 feet. Anyone?