Yeah I've found that same information. Trust me, I wouldn't have made this thread if I hadn't already searched every info source I can think of. The problem is that developer comments, in Live Letters and otherwise, specifically state that is possible to sell/trade/transfer housing. While that's true for the housing permit, the permit is less than 10% the cost of the land itself, and it seems stupid to me for them to say you can trade housing when you can't trade the much more expensive land.
Mostly at this point I'm looking for anyone with first hand knowledge of what the Relinquish Land option does, not hearsay and not developer quotes.