Congrats! How exciting. I do believe that someone in either MA or ME had a Haunted House head not long ago. I don’t recall who it was but I definitely remember running into it before. There is absolutely a head floating around somewhere between New York and Boston possibly further north.
I had been tempted to buy it and salvage a lower cabinet I had seen but never pulled the trigger.
I would reconsider your decision to leave out multiball. Those pinball brothers made a Haunted House speech AND multiball mod for the original boardset, it was only left out due to time and memory constraints. I believe HH was originally supposed to have both.