Not hardly any weight for the second slide in the case of a Host. If I remember right on the build sheet for mine, it was 250 lbs. You replace larger cabinets with framing and they are usually not very deep considering both slides are generally across from each other in a two slide model. Also, a shorter slide camper feels much bigger than a longer one that only has one slide. You’ll also have less overhang which makes towing a simpler issue to solve.
You’ll gain more weight by going a foot longer compared to a second small slide with all else being equal. Also, some brands are heavier than others, so a two slide model could be lighter than a different brand one slide.
