Totally agree with every word of this post and your other post above it.
The part about no evidence of drugs is puzzling to me. Everything, to me, leads to drug use, and their disappearance jives with the resulting paranoia. The journal entries...the bizarre graffiti, complete with misspellings and emphasis on certain letters and words (spray painted red over the original black)...the demons and angels and spirits...the surveillance camera (even though Starlet says it was her idea)...the desire to move off the grid...their appearance in their most recent photos as opposed to photos before and right after Madyson was born...Colton moving out...Starlet's claim that they were having money troubles and Bobby's supposed, unknown solution that would not involve Sherilyn....
And then there's the handyman that Sherilyn shot a gun at right before they vanished...(who has been busted a few times for making meth, I have to add...)
Sherilyn also claimed that she was going to leave Bobby and then went to a mental ward soon before they disappeared, correct? Hospital psych ward stays are very short; they're only so doctors can stabilize a patient and tweak their meds. Very often, meds are raised sky high (or cut out from the patient's course of treatment altogether) during the psych ward stay and this can cause the patient's state of mind to change drastically -- for better or for worse (Re: Andrea Yates).