nothing worng with water based printers. I had two,, still have one. They still have a place. They getting low in price and are fine to learn upon. There is a lot more to printing than just hooking one up. They are not desktop machines.
Learning how to profile, color correction, laminate and other details on a used machine is exactly what I did. Ink is so cheap now that its no longer a factor. Supplies can be had for half price. So as far as media costs go its not a factor.