I would urge you tojoin the HP Latex Group on Facebook before you dive into a 700.
There are many interesting post about those printers.
In my area Bell & Howell services the HP Latex Printers
Also, by my calculations The Roll to Roll Latex printers should have a life span between 700 & 1000
rolls you 54"x54 yards of media. Less than 700 rolls is probably a
sign of poor Maintenance and more
than 900 rolls; you definitely got your moneys worth.