I'm 6 months in and it has definitely ended my life as it was and nothing is the same. I'm pretty lucky that my wife gives me almost 16 hours of free time daily, from which 8 I work and 8 is for sleep. If I want to work out or do something else I need to steal it from the sleep time. It's pretty early though so I might be looking back in a few years and think that it was not that bad actually :)
A lot of gyms will watch your kids while you work out. Great opportunity to give both of you a break.