I managed to put the cleaning gun, the obstacle course, and Todd’s tombstone in my inventory and I moved everyone out (with poor Aaron’s marriage unconsummated) and plopped down a new Swanson House from my lot bin.
And it was still bugged. I ended up with an extra grave stone, deleted that, and finally sent Todd’s gravestone to a community lot and that FINALLY seemed to fix it. To test it, I decided to have Bianca marry. After first checking all relevant life meters 🙂
A lovely roof raising wedding, with no deaths, game crashes or blue screens was had, and upon their return Bianca and Dan borrowed mom’s bed ..
and Aaron and Phyllis decided against their own chance in mom’s bed (ewwwww!) and had their first woohoo, consummating their marriage, in the hot tub.
Gethane's Digital Scrapping 
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