Children are extremely taxing on time. If both parents work, even more so. It's harder to go out (so now you have to cook most nights) the amount of laundry you have to do doubles or quadrouples. Then there's trying to teach your kids the skills they need to be competitive in a globalized society. Combined with a full time job, you have zero time left over for things you WANT to do, and more than likely you're leaving some things you HAVE to do on the table too.

To me, side projects are probably a rent seeking activity. If I can find 20 minutes here, and there, and turn it into something that generates cash... maybe... just maybe... I can use that to buy some time.. the thing I cherish the most.