How important is a bottle washer if you plan to breastfeed?

We are expecting our first and planning on breastfeeding exclusively, unless we have a medical reason (low milk supply, baby won’t latch, not enough weight gain, etc).

I’m planning on pumping and storing milk so husband can help feed the baby too after a few weeks. I’ll be a SAHM besides about 1.5 days a week, so I will be feeding most of the time. We have the doctor browns anti colic glass bottles (want to avoid as much plastic as we can).

I recently had a friend say that a bottle washer/sanitizer was absolutely necessary because with their first baby, they ended up spending about an hour or two washing and sanitizing the bottles everyday by hand. She said even with a dishwasher you need to wash by hand after because dishwasher can leave behind a film/residue. Also said there are so many little parts to wash by hand.

Is this true? Is it really that tedious and will I have a lot of bottles to clean if mostly breast feeding?Should we put the bottle washer on our registry?