I dunno.
That he has let the property fall into such shambles I am not sure that he has the ability for whatever reason to "fix the house up". And he is so vindictive……..
I gotta say again I wouldn't personally walk away from that table with my name on the note. A divorce decree does not supersede a contract - you will still be liable for that note no matter what your divorce decree says the stipulations are. The bank does not care - and it will be on your dime to bring him back to Court to enforce those stipulations though you may be able to get attorney fees after the fact (certainly should be part of the agreement). That he is making money but continuing to rack up debt a huge red flag. I would take that option of selling even with the quackery of moving to Europe with a very strict timeline.
His attorney probably hates him. I am sure they had a negotiated plan going in and if she could have would have been pulling her hair out at the table. This man is just insufferable.
Hope today you achieve freedom!