This is one of the big problems with used MHs. Well meaning people buy RVs and then with minimal knowledge start making changes. By the time you get the end product it is very difficult to sift through the make shift modifications and haphazard repairs that were made along the line of ownererships. Sometimes it is easier to rip it all out and start over. This is one of the big reasons I tend to avoid used RVs. There are some good ones out there but it is also difficult to really see all the repairs until you buy it and start having problems or restoring it. It is bad enough sifting through manufacturing problems when they are new.