I had cataract surgery two years ago, and I faced the same choices. Insurance covered monofocal, or multifocal at $4k per eye. I went with the monofocal, and here's why:
1. $8k
2. I had experience with multifocal contacts, and it took some work to get them "dialed in," slightly varying prescriptions, different technologies (aspheric vs. concentric). What if I spent the $8k, and they weren't "dialed in"? Then what?
3. It was my understanding that in some circumstances (dim light, very fine print), I would need "readers" anyway!
4. Side effects, notably glare from bright lights at night.
The surgery gave me 20/20 in both eyes, and a visit to Dollar Tree took care of the near vision.
Recently, I went to contacts, Acuvue Oasys multifocal, and now, at the age of 67, I have the best combined vision I've ever had! Ain't technology wonderful?
What no-one has mentioned, is the cataract brown tint. My visual acuity deterioration was gradual, as was the addition of a brown "filter." But whoa, what a difference when that was removed!
Just my experience and thoughts, YMMV. Good luck!