Mutohs might be worth it then. I'm talking CAD funds too, btw. So our heads may be cheaper in USA Too. It could also be our heads are just expensiver in Canada due to demand.
But lets say our heads last 5 years.. $32,000 every 5 years is roughly $530 per month.
Heads for the Latex are $130, So we could replace 4 Heads per month. Theyre warrantied for 1 liter, but the expected average is 4 liters... Some people can double that, but lets go with average since thats what we're doing with the solvent.
So if you print under 16 liters of ink a month, latex would come out equal, or better. Even if you half it for the mutoh price, thats still 8 liters per month. Which We do do on occasion, and I'm sure some shops do every month... But I don't think most shops hit 8 liters per month.
Of course this isn't including anything else, cost of ink/maintenance, it's just a straight head to head replacement cost based on average. Not to mention the "Oh shit, the cheap banner just caused a headstrike" repairs... Doesn't happen often, but it does on occasion.
The thing I like about latex is if a head is going bad.. Whether its fuzzy text, misfiring nozzles causing banding... you just replace it and the machines back to perfect. At $2/4000 a head you try to hold off until it gets bad.. We went a month with minor banding, it annoyed the hell out of me, but wasn't my choice.
Again, not saying its cheaper! I know 5 years is "Average", OP just got 9 years and only has to replace 1 head. In his case, he comes out way, way cheaper than Latex.