I'm in a similar boat, was mulling over it hard because of the economy and people having problems finding jobs, but the last time I went out on my own, I made it work and I had a lot less going for me back then. So I felt like there was no better time and motivation to deal with the roller coaster of working for yourself is something you have to be mentally prepared for and I am now.

Good luck and don't second-guess yourself, just make sure you've got enough fail safes in place to make a go for it and don't look back.