Sorta of afraid of posting this...but...most everything that has been found and testified about so far, you would find at my house. I don't have tanks of gases though.
Surprisingly, the areas in the outbuildings also didn't send up alarms to me. I know many farms that are no longer operating as livestock farms and there's usually many outbuildings. Many are full of things gathered at auctions, equipment from when it was a working farm, estate furniture and belongings from deceased family members...yes a type of hoarding, yet fairly common.
The one item I don't get is the dental numbing medicine. It's an injectible, AFAIK. There are topical numbing medicines, but I personally have not seen them in the type of container those in the fridge were. Shocking enough, I have injectible lidocaine, which would be similar. HOWEVER....I must add we have a much smaller farm, but do have livestock, and pets. Even though we are country, not many vets will treat injured chickens, or pigs. You learn to treat them yourself, and I have the needles with string attached to put stitches in if need be They were purchased right off ebay...
Restraints? I don't think I still have the leather ones, but I did have some that you put around a horse or cows legs to keep them from kicking at their newborn baby so it can nurse. I believe a friend borrowed mine, and I didn't have a need for them, so never asked for them back.
As a gag, I was given a set of thumb handcuffs. No idea why I have kept them.
I guess what I'm thinking, looking at each item, it doesn't seem that bizarre to me. However, looking at the whole picture, and DNA, and missing people, etc. it does add up to nefarious reasons.
I'm not sure how different cultures, and livestyles are in that area, but from what I have gathered through the time on this case, much is like rural areas here in VA. Most larger farms have been in that family for generations, and if the current owner needs money, then the timber is cut, or a few lots or parcels of land are sold. As many of the older generation retire from active farming, they usually want someone in the family to continue the tradition.
Since it doesn't seem the rest of the siblings were interested in farming, I can see how the parents just let him do what he wanted. Afterall, he was present if they needed help with firewood, mowing the lawn, moving items, driving someone into town, etc. And likely the entire farm would have been left to him at their death.
Did they realize he had some 'issues' or mental health problems, maybe, and probably. However, that generation here do NOT openly talk about it. I remember asking my Grandmother, who at the time had been diagnosed with brain cancer, if my Aunt had always been the way she was. Grandma pointed to her head, and shook her head, saying "she might have something like I do, it's best not to talk about people"...