Important new information. Apparently Dan had initiated action to restrict Wendi's mothers access to the children. This was probably the triggering event. Now the question is "where did the money come from to pay Garcia?".
We can assume the family's financial records have been gone through throughly. Cash withdrawals corresponding with cash deposits by Garcia or anybody with ties to him, would be a classic amateur mistake. There are better, more discreet ways to amass enough cash for this sort of thing. Businesses that do cash transactions are perfect for that.
It is interesting to note that Wendi, in on of her "writing assignment" pod casts mentions that her father is 70 years old and a brain cancer survivor. His role in the practice and in the business side of operations, might be minimal, but Wendi's mother, the "wicked grandmother" Dan was trying to his kids away from, was the business manager of the practice.
So far, we know little about her, or the rest of Wendi's family. I suspect we will get to know them later in the next few days.