If my DH disappeared in the night, leaving me and our little son alone, my parents would have insisted on taking us to their house where they would care for us both until I could wrap my head around things. I do not find this odd in the least. And, yes, I would go because I would not be able to take care of us very well.
If my DH was missing for 7 weeks when I returned to my home, my dad would have the locks changed without even asking me and he would stay with me and never let me go anywhere without him. This is what protective dads/grandpas do. I do not find this odd either. And I would need him to be there for me and my son.
The biggest red flag for me is the 3:30 time of last being seen alive. I can't remember where I read this information but, when one is lying 3:00, 3:30 seems to be the time everyone thinks of first. Maybe it was Haleigh Cummings' case, where the dad's GF said she woke up and noticed the back door open at 3:30 or so.
If LE sprayed luminol in the house and it lit up bloody anywhere, the wife would have been taken in for intense questioning. If there was evidence of a bloody crime, she would be arrested since it would be known that she lied about his actions that night. This hasn't happened.
All couples fight and it must have been very stressful in the home. She is a stay at home mom and he was now at home 24/7 - in pain from surgery and the recuperative period without pain meds and there must have been a lot of waiting on him hand and foot. Not to mention him, a type A pilot, being bored and he may have started accusing her of having affairs. Just thinking how a bored, Type A, used to being in charge of everything and everyone having to listen to his orders, stuck in the house and in pain would act. I think he would be a pain the azz. Perhaps she called him a paranoid schizophrenic because she was still mad at the constant accusations. Maybe?
Did he ever get his pain meds filled at the pharmacy? Could he have been selling them to someone that he was to meet in the woods in the back of the house and then ended up going for a car ride involuntarily? Was the back door unlocked when he was noticed to be missing as if he was coming right back ? Surely, he wouldn't intentionally leave for hours with the back door unlocked and his family asleep.
It seems to me that she called LE later in the morning after his disappearance and waited 4 days to call his family. He didn't leave in his car so she would have no reason to think he was just going off for a few days to cool off after an argument -on foot.
We haven't seen any evidence of financial issues, major marital discord, pending divorce, etc. He was about to go back to work. He didn't walk off and kill himself. He isn't accessing his bank accounts or using his credit cards.
OTOH I know of a husband who went out for his usual early evening jog around the neighborhood and shot himself in the head in a woodsy area. Of course there were lots of issues in the marriage, clinical depression, alcohol issues and pressure to make more money from his social climbing wife, but he adored his children and NO ONE thought he would ever do such a thing. So, it can happen.
It is very odd that no one seems to be actively searching for him. Not LE, not the family, not the community - no one. Perhaps he was located but doesn't want to be found? It is legal to walk away from one's life - albeit selfish and harming to family. However, this smacks of foul play.