I have one of those premade wooden Garden Sheds that people buy pre-constructed and move into their yard. Mine is the type that looks like a mini barn, with barn-style doors and gambrel roof. The side panels are made of partcleboard and they have begun to rot and disintegrate from the bottom (ground) up. The previous owners probably should’ve put the shed on something, but it sits right on the ground. If I can repair the shed, I will probably have a concrete foundation poured for it. I need to know if anyone’s ever tried to repair / rebuild one of these sheds and how hard it is and whether it’s worth it? New ones cost a few thousand dollars and I can’t afford to replace, but since the frame and roof are in such good shape, I’d really like to repair before it gets worse. Do you have any suggestions on how to do this? Books? Website sources?

Thanks for your help!
This shed is not made of a frame that has siding over it. It is actually panels of 4 by 8 foot plywood that are inside the frame and outside trim. I am concerned as to whether the shed will collapse if I attempt to remove the plywood panels, since they seem like they are adding strength and stability to the structure. How would I take it apart down to the frame and keep it from collapsing / sagging? Thanks!