You got a tough schedule. I would take an excel spreadsheet and create a daily schedule of everything you do for each day of the week. Start blocking out the time periods that you must do other things such as work, travel to and from work, take care of your kids, sleep, etc.
Once you have that made, start to look at your free available hours each week. You have to be realistic w/ yourself. 16 hrs per week may realistically not be possible w/ your schedule.
Once you find your free time in your schedule which you can study, you absolutely must use that time as effectively as possible.
I don't have any kids so I have more free time then you do. I am however extremely familiar w/ distractions. I can turn 4 hours of studying into an all day event - literally. I can afford those distractions in my schedule, but I don't think you can. You need to find a place to study w/ no interuptions or distractions.
AUD - 81, BEC - 74, 80, FAR - 82, REG - 81
Done!