im no contractor or brain sur... but common sense. the to homes dont have to be up next to each other. welder,, metel beam,s and concreate.set the two homes together,level both of them as one ok now thejob is to keep both level . dig holes under the frame all four corners , ten feet from each corner front and back of each home now you can do this before you move them into position putting the metel beams into the holes weld then pour the concreate in holes (weld m/beam to frame)remember on a single mobil home all the wieght is held by the outter walls so long beam were you put them together at that will support the center now for the outside all i can say is go look at a two car garage without the side metel . think about what it would look like if you was to put two mobile home in it and then put siding on o yes and dont forget to frame your windows and doors .. that what were doing here in kentucky.