Park Model-contact your local city/county/state planning department and find out if they even will allow a “Park Model”. Generally speaking, in most areas that will allow them, there is some sort of “Placement Permit” required. The cost and duration of those permits vary widely.
14' wide x 28' long with an 8' overhang. The gambrel ("barn style") roof maximizes storage space on the upper level. Plenty of room inside - 8' clearance on the lower level. 7' 6" of overhead clearance on the second floor!