Seems like a great set up. When your kids are older you can make more money. Being home and available for your children is an awesome benefit.

You are probably better off than 95% of the people in your age range, in terms of what your able to save towards retirement. Remember that most people don't even have $1000 in savings. Your probably putting away $1000/week towards retirement if your both maxing out your Roth IRA and your able to shuttle your kids around.

My wife left the workforce and stayed home (with our young children) for 7 years. She now works from home 30 hours a week. Very flexible. I'm still on track to retire by 50 with a pension and my 401k/Roth. Wouldn't change a thing.

I don't work in private industry, but I imagine it's very competitive and the idea of climbing the latter is present. But opportunities will always be available down the road for those that are competent.