IS IT POSSIBLE TO BUILD AN UPSTAIRS ON TO OUR MOBILE HOME? IT IS SITTING ON FOOTERS THAT ARE TWICE THE REGULATED WIDTH AND DEPTH, IT HAS ALSO BEEN UNDERPINNED WITH BLOCK AND THE TONGUE REMOVED. I KNOW WE WILL NEED SPECIAL SUPPORT BEAMS INSIDE. PLEASE CONTACT ME WITH ANY INFORMATION OR SUGGESTIONS THAT YOU MAY HAVE.