From my experience buyers typically prefer these lots because they will not have any neighbors directly behind them.I can't tell from your question if there is an existing house built, that you are purchasing, or if you are buying a lot and going to build on it.Also, you should have access to an interactive flood plain viewer to look where the 100, 500 and zone X for the flood plain are situated.

That would hurt the existing tenants who get kicked out! 

There's a really strong investor community which tends to be a great way to spread the word about existing Airbnbs coming for sale. 

When you purchase a home "subject to" the existing financing, that is when a mortgage stays in the sellers name.

It is one reason JADUs are often pulled for the RE sale- JADU must come from existing permitted space.  

A true free market doesn't exist as far as I know.

Vancouver promotes water conservation, so including water-efficient fixtures could be a selling point.Remember, while these additions can add significant value, the exact ROI will depend on your local real estate submarket, the quality of the work, and how well the new spaces integrate with your existing home layout.Please reach out, I can help you with the funding of the project.Regards,Jackson

I've noticed a number of SF posts and they have been split between 1) I want to tap my existing equity for investing or 2) Need the cash. 

Lol my last comment still stands that I'm sad for how close minded you are to think that my experiences simply can't exist, and you're the only correct person in the world...

You make him an offer subject to his existing (hopefully) low interest loan.