Any idea's on how to make a quick buck.?

Me mate is getting married in new zealand,she wants me to be a bridesmaid,i need to make some honest money and quickly, please keep in mind i got a 7 year daughter and cant really afford a babysitter.I already work mon to fri 9 to 5,but being a single mum with out help from dad or government dont leave me with anything to put away towards a trip like this.Please please only sensible answer's,thanks.