From what I've heard of the notes, I think it's a pros. rabbit hole. The lists were found under a keyboard with no indication of when they were written. The could have been there for months.
1.) List of assets- they were planning to buy land and build a house in '07. They would need to collect all this information for the mortgage paperwork. Also, considering the debt, there may have been some need for financial planning/debt consolidation/etc.
2.) List of kids' fav- from what I've heard of the list and where it was found, my guess is that it was something he emailed to his parents/siblings. We don't have any local family and my parents are constantly asking for information on the kids. They want to know favorite color, what foods they like, etc to talk about when they talk to the kids on the phone. They also like to have the information when buying x-mas/b-day gifts. These type of things can change frequently with kids, esp girls, of this age. Given what has been written, BC parents weren't going to ask NC about this stuff.