I am a little older than you all so here is what you have to look forward to when you have a big house and 3 kids....
Mortgage: $2,980 a month
Food: $800ish a month
Health: $1,200 a month
Car insurance $180 a month
Electric $250-300 a month (I live in Texas and it gets Hot!)
Other Utilities: $150-200 a month (got a big lawn to water)
eating out:$500 a month (yes separate from groceries)
Cable/internet: $120 a month
Gas: $300 a month
wife and my cell: $200 a month
Home Insurance: $120 a month
So I am at $6K a month before entertainment or other expenses, booze, etc.
Seeing all these other numbers is sure making me consider a simpler life.