Hello, it seems that ink usage is one of the main discussion points on this printer. I made for myself a rough calculation. I am from Germany so all ist in Euro.
A complete set of 12 cartridges is about 550,00. Estimated, that somewhat 30% are not printed on paper, you get rounded 800 Euro per liter.
As an average I have 0.9 ml per A4 print and 1.6 ml per A3+ print or
A4: 0.72 €
A3+: 1.28 k
Ink per print.
The paper I use at the moment is 1€ for A4 and 2.20€ for A3+.
The printer was 1.100€, a printhead costs 450€. If it is possible to make 3000 with ohne additional printhead and several waste cardridges it may sum up to 1800€ or 0.60€ per print (if you ever make so many prints).
Summary
A4: 2.32€
A3+: 4.08€
Money for inks is about 31%. Using expensive fine art paper makes this percentage even lower.
Compared with the printer costs it is most expensive not to print. Sometimes I find the discussion is like: I bought a Maserati, but I cannot drive with it, because it consumes to much fuel.
So I showed to my wife how to print from her tablet and mobile phone on a cheaper paper. At every possible moment we now give away prints to our friends instead of sending picture files. We found out, this printer is so good you don't have to bother about colour management when printing from mobiles.
Let the good print be with you.
Maximilian