I too enjoyed my 24" Z3100 for profiling, ink frugality, large tanks, easy to replace printheads, the cutter, etc. It produced prints I really enjoyed. Note: I do NOT print professionally.
Perhaps because I bought one shortly after they were released mine was a maintenance nightmare after a couple of years. On a couple of occasions HP techs spent a couple of days taking it apart and getting it working again. The last time it died was indeed the last time. Many of its maladies were perhaps things I could fix. The truth though is that I want to spend my time on my photography not learning how to be a printer repair tech.
Anyway, if anyone is near Charlotte, NC USA I'll be happy to give away my 24" Z3100, ink and several 24" rolls of paper.
I'm quite pleased with my Epson SC P800 these days. It cost less than a visit from repair techs for the Z3100.
Sorry to hear you had a bad experience with your printer - you've mentioned it numerous times. I understand what you are saying about not wanting to be a repair technician, and unquestionably, if you got a rare lemon, it would be frustrating all the way through. If your printer was a 3200, I would ride up there and take it off your hands. Have you tried eBay or Craigslist? They both are good resources for finding new homes for printers.
Glad you're having better luck with your Epson SC P800. I'd like to point out that just because you had some problems with the Z3100, it's not a reason to disrespect the printer. Many very well known folks on this forum have them.
As to your comment about not wanting to become a repairman or mechanic, I think about having a wood shop with table-saw, jointer, planer, bandsaw, etc. Most everyone who has these kind of machines has to have knowledge about having to keep them in tune. Obviously, it's not the same thing, but most folks who keep their printers a long time do become at least somewhat knowledgeable about how to make certain repairs. Otherwise the printers end up in the dump.
But I hear you. Again, sorry you had a bad experience. I remember there was a time you were flying high with that printer.
Mark