I agree with Own, job, and Grace - very good advice there.
Your attachment to the property is something that can be exploited. I do understand your desire to hang on to the place. Remember this is a business deal, leave emotions out of it.
Like a kid in the sandbox with a toy, as soon as you don’t show interest in it, the bully doesn’t want it anymore. But, you need to really mean it, to really be there. I’m not saying that will happen, that H will loose interest, it’s just the place you need to get too when negotiating with H. Don’t forget he is irrational and will “think” emotionally. As you said it was like negotiating with a terrorist.
You bluff idea sounds interesting. I do think there is too much on the table to risk with such a maneuver. However, a lawyer really needs to be consulted to look over all the aspects of your situation, and provide a solid answer on the best course of action regarding that. That being said, Own’s reasoning/advice is pretty solid, in my layman opinion.
DnJ
Feelings are fleeting. Be better, not bitter. Love the person, forgive the sin.