Auto Buyers Guide

I publish an advertising magazine every fortnight in Toowoomba Australia, it consists of photos of cars and descriptions. I need a graphic designer to cut cars and type descriptions with logo's at the top of the page. Some fortnights it could be 20 pages, sometimes it could be 24, it varies in increments of 4 which is what the print is set up for. I will upload out last magazine which has 20 pages. Currently I am paying per page for my current GD so it would be helpful if you could quote on this maybe. There is a print time we have to put our pages to print and it's essential we do this and also the page turnaround has to be within a couple hours as well. Okay there is probably more but this should be enough to work on thanking you.