That can’t be undone and is emotional for many people as they age.Also from a financial standpoint this property will not cash flow so you will lose money if problems arise with the property such as needing a new roof, plumbing problems, etc.

Stop digging yourself deeper, hit the reset and sell while you still some control and options.

You are competing against RE investors that have experience, likely deeper pockets, likely more knowledge, likely a better network.The house hack is not available to most of these more experienced investors. 

They tend to overwhelmingly base their decisions on emotion rather than common scenes.

Neither the BC assessment document, nor either parties’ emotions, are tied to a current true market value.

I realize you are upset about a number of things, let me acknowledge that emotion first before attempting to rationalize a bit. 

In all of this try to not get involved emotionally.

The obvious watch outs: don’t get emotional, don’t be influenced by the auctioneer or other bidders.

Just wanted to take a second to introduce myself in hopes that it may emotionally resonate with someone out there. 

Perhaps hitting his emotional side could work, maybe he has family somewhere else and by selling this home it allows him to be with them or closer.