I've owned one inkjet...never, EVER again! My printing demand is irregular; I might print one document, go a week or two before printing another one, then two or three weeks later, print the equivalent of a small novel. The nozzles in the inkjet I had (an Epson, btw) would clog in a little as a week of disuse and required massive amounts of ink to clean.
A good laser printer isn't cheap and is bulky but is by far much more cost effective, especially if one prints infrequently. I will never own anything but laser printers. Laser printers don't make as good photo prints as inkjests (misspelling deliberate) but those can be farmed out. The tone cartridges for lasers aren't cheap but the cost of use per page is much cheaper than for inkjets.
Of course, going paperless is the most cost effective whenever that is practical (I've done that to a large degree). However, one thing that will save money that the article doesn't mention is farming out your printing to a print or copy shop. If you have only an occasional need for color prints, such as photos, etc. it is much less expensive to just get a B&W laser jet and farm out any color print jobs to a copy or print shop. I have a color laser that cost me an arm and a leg (and a few other body parts I shan't mention) but I got it for the convenience of always being able to print at home on demand even though I rarely use color.