You need the wife on-side… the problem is they dont know and dont care about the level of work you have to put into this.
Like everybody said, you dont need stupid distractions like her and the kids so best you move to same dorms as the other kids , and here you WILL feel alien as you are at completely different stages of life.. aka they dont have any..at all. So they will crank out 22hrs of studying a day and you can too without trivial homefront niffnaff.
Let the fam know you love them and all that jazz, and ensure them you need this 6 week period to disappear up your own butt to complete this.