Running costs of 3D printing In the year that I have had my Flashforge Adventurer 3 I have just had a second extruder head break.  The replacement cost (in AUD) is 135.00. 
But, I'll also need a new nozzle and a replacement ribbon cable for the extruder head.  That will add another $40.00.

Apart from filament costs, that brings the cost of "consumables" for my printer in the last year close to $350.00

I'm beginning to think this makes the running costs for my 3D printing very high, but I have nothing to compare this with.

Does anyone care to share what it costs them to keep a 3D printer operational per year?  Do my costs seem high?
I have a Prusa I3M3+MMU2, which I have had for a year.

During the first year, the display failed under warranty and replaced for free.  The power supply also failed, and although Prusa replaced it, I was in a hurry and bought another supply to use as a backup for about \$60.00.

I have used two rolls of paper towels, a bottle of acetone, and a quart of isopropanol, for maybe \$5.00.

I have bought a spare thermister for about \$10.00, but haven't installed it yet.

I bought a couple of new nozzles for specialized materials for \$35.00, but the nozzle I got with the machine isn't worn.

I bought the textured build plate (when it was finally available) for about $30.00.

So, my running cost, exclusive of electricity, is about \$140.00, including buying accessories which haven't been consumed.

I have also bought way too much filament, which you aren't counting.  Filament cost has dwarfed my other expenses.