Earlier quoted context omitted.
Having kids doesn't have to be a big problem. The important thing is to have a space which is work, and make sure everyone knows that when you're in that space its like you're at the office. I've got a three year old who is used to me working from home and doesn't cause any problems at all.
That might work for you, but every time this discussion comes up around here, there's a whole bunch of parents complaining how their spouse and kids simply will not stop disturbing them, no matter how much they try to explain that they can't do this.
I also know of far more people who complain of being constantly interrupted by managers and noise in an open plan office. Its not like modern offices are an oasis of calm.