I did it 4 weeks ago, I know how you feel I have 2 young kids (2 & 4).
My story is that I worked for someone for 20 years. The chap had other income and seemed to lose interest in the electrical buisness, it got so frustrating in the end because customers were contacting me asking me to chase up the boss. He stopped quoting and invoicing was slow. When regular customers started moving on to other contractors I realised I had to go, or I'd get binned eventually anyway.
I'm doing OK so far, it's only my 4th week and more and more people from my past have realised im now setup on my own. Im pricing multiple jobs for 4 different builders, ive got a couple of industrial units that I provide maintenance for and so far not had a day off.
My wife set up a Facebook page but it's proving to be a pain in the bum so far, I'm looking a silly jobs, and it seems most of these people don't want to spend the money, they seem to get everyone round and go for the cheapest quote, I'm not really into that, the 6 week wonders are welcome to these.
Fortunately I know alot of buisness owners and people in trades in my area, a I think that has helped me a bit but I have had to try and take everything that comes my way.
I'm finding it hard with my time at the moment, I find I'm spending a lot of time looking at jobs, it feels weird because I feel that I've not made any money some days, I think it's just because it's new to me. Im doing all my quotes in my evenings so don't get a great deal of time off.
I'm sure it will all settle down.