I've been running a CJV150-130 for two and a half years now in a small shop and we do about the same output as this guy. We shut down every year around Christmas and New Year's for at least two weeks. I've let the printer sit idle for as long as seventeen days without even a light cleaning of the head first and got a perfect test print. I've never had to perform daily maintenance. Hell, we get so busy, I'm lucky if I can even perform maintenance on a weekly basis. I don't even run test prints but maybe every 3 or 4 months because these things maintain themselves, for the most part, and print flawlessly. But that's just my opinion and I have no experience with latex, personally. We bought the Mimaki for our shop because the complaints I read on this forum with regards to Mimaki printers are few and far between. The print and cut capability is amazing also, once you figure out the machine's quirks.
Do you do much contour cutting of printed/laminated jobs? I ask this as Im hoping you can provide feedback as to the accuracy of the cutter, my cjv30 was NOT very good at doing this on larger jobs. Like if I had a printed/lam/cut decal job for a van for example and the logo or lettering was multiple colors and longer then the width (54") I would usually do it in 2 pieces when there was a break in letters if I could.