As someone with two kids myself, I know your situation. I used to play CCGs all the time when I was a single guy, but now gaming time is at a premium. Still, unlikely my younger days, I can now afford to buy the games I want to a reasonable degree.
One of the reasons I'm excited about this game is that its the first one to be released since my return to card gaming, so I can get in on the ground level with it. The LCG model is a lot easier to keep up with than the CCG one, and online shopping means I don't have to leave the house to keep up to date.
Family life permitting, I even hope to make a tourney or two a year as well.
I think a lot of potential Conquest fans are in the same boat. 40K is a franchise that's been out for a long time, and a lot of its fans are probably at that stage of their lives with families of their own and limited gaming time. Though I'm an avid tabletop player, as well as a player of AGoT and A:NR, something's gotta give when this game comes out. Unfortunately, it's probably going to be Netrunner, as my friends all play AGoT and tabletop will always be my preferred method of gaming.