I bought a Inkjet Brother Printer about 8+ years ago and I have refilled the ink-tank just once after the first installation. I think a full-tank last about 5 years. I’m about to add a Brother Laser Printer too.
Oh! I also print for the neighbors pretty regularly (I live in a large gated neighborhood). Their kids needs some good colorful print for school, I do it for them. I’m the guy who keeps unexpected things that comes in handy. I’m happy with that.