If they were
selling the amount of weed, that we've been told they were
growing, then they'd almost have to be laundering the money. It couldn't go into a bank, they couldn't go to a lot and by a Lincoln Navigator, or Jeep Rubicon, the $30k toward the home probably raised eyebrows, so he had to have some sort of legal way that he could show, that he had that money, or if illegal, some way that he laundered that money. It would seem to me to me anyway. If someone gave him the money, it would have to be accounted for, some way. A gift. Who would give them a gift of$30k, in their family and friend circle? EDIT: Did he skim? That's not cool, at all. Deadly.
The sale of the house reflects that it was sold for more than $30k. Someone, along the way, (the powers that be), would want to know about the source, of that $30k. That 30k may have been what tripped them up, or, it could be that someone wiped out an entire family, and extended family, over one child,but, if drug use was involved by the killer(s), and anger hit a fever pitch, then yeah, it could be possible. Especially if it was meth. Unless you know what to look for, you may never know that someone is using that stuff til they're so far gone, they're mowing their yard, with a headlamp, at night, in their underwear...
This is simply theorizing based on knowing how frickin' picky the banks are about $$, as well as the ever watchful govt., and, knowing more than one meth freak. Meth is a very dangerous drug.
Edit:
The Problem with Dirty Money