When Mom & Dad downsized form their 3BDRM, 3 car garage, two story 100+ year-old house into a 3 BDRM apartment in their late 80s, I was sure that the ~$1,000 a month rent would cause them to start using up their savings. Much to my surprise, it did not. As things turned out, water & sewer, heat, and basic cable were included with their rent. They gained a covered, heated parking space for their car and onsite laundry facilities. And no more repair bills. By then, they did not take trips out of town, so they lived comfortably, if economically, on ~$25k per year. They were not internet savy, so shopping online was never an issue for them.
That has changed since Mom passed away at 95 and Dad moved into assisted living. He runs about a $2,500 per month deficit now and I've had to start selling some of his assets. If he does not need more care, then his savings should last another 6 years. Dad will be 99 in January. He started with about $250k invested roughly 65/35. Dad did alright for them, especially considering how little he earned in his lifetime.
Note that they were both mostly healthy and Dad choose a good HMO to supplement Medicare.
Edit to add: Dad has pretty bad arthritis and needs a wheelchair, so once Mom died, he was not able to stay in the apartment on his own. He has a DNR and in no way wants any medical treatment that would extend his life.