If you are doing that many have you looked into a wide format printer.....Might not be portable enough but will be faster and cheaper.....
If you are not printing often on the Wf1100 at least every 3 days or so you will have banding issues.I only print that many in an event about every 2-3 months. I do want a wide-format printer, I'm just not able to spend 2-4k yet to set it up.