I've heard Health Insurance is pretty expensive if you are self-employed. How did you deal with that? Is your wife also employed in which case you are just able to share hers?
This is a big business stopper in Germany, too.
Health insurance is a must here and can easily add up to 500 Euro or sth. like that per month when you got a wife (not working full time) and children.
So getting ramen profitable is possibly much harder.