What i would do in your shoes would keep you full-time job and get some cards printed do some part-time work at first, you can still registry SE.thanks for the replys guys,
to be honest im going to get christmas out the way, then have a think about it,
Advertise on the free websites like gumtree, Friday ads, viva street etc.. and get your cards into local shop windows and through a few doors. Chose the locations were you post your cards of leaflets carefully and logically. As some areas you just know your not going to generate any work!
Then see how that goes, once you start doing some jobs, the word gets around and it is surprising how work is generated.
Don't do any expensive advertising via Yell or quarterly magazines. You will find you get inundated with calls from these people, don't commit to anything over the phone, if you ask for details through post they very rarely appear. Be careful of advertising cons!