I want to start producing banners, which are the best value for money large format printers? -

It really depends on the size you want. Most printers that you buy at say officemax or something are only going to be able to print prob up to a 13x19 Hp has a 5600 or 5400 which are good, but if you want quality and you need to sell thse or soemthing you can also get an Epson band. But if you need like large large banner size, Cannon has some, but they re expensive! ahhhh Good luck!