Very rarely is it the builder how lets this happen.
The builder sells the Van once the family comes along and they can't all fit in or isn't enough time to dedicate to the Van or events.

Van gets sold to someone with no real appreciation to the work involved (yet claims they built it, after installing a set of spark plugs from K-Mart) and treat it like the daily work hack and party machine and starts looking tatty. Loses license, and because of this has no job and still owes a bucket load on the loan to buy the thing.

Sells it to the only offer and it's all down hill from there sadly.

Regards, Smooth