Safely ignore the means that rich people have used to store & generate wealth for centuries in favor of investment products whose prospectuses specifically state "Past performance is not indicative of future returns." ??? mmmkay.
Okay, you tell me what sort of non-real-estate investment options would have been available to, say, an average income receptionist in the 1960s who did not win the lottery or receive any sort of windfall. And they have to be investments that would lead to that receptionist being about to retire in their 30s. Because we have that now, and as far as I know, did not back then.
Marrying well. /s
However Money Market rates in the early 80's were insane.
We're talking past each other. You'll be able to FIRE because your housing costs are substantially reduced relative to market rate rents via your coop. In parts of the world where there isn't a mechanism subsidizing rents or capping costs with rent control, there is a cross-over point at which buying via leverage and owning comes out ahead financially because future housing costs are substantially reduced relative to market rate rents. And the surest way to build wealth is to reduce expenses. Owning, if you buy early enough in life, enables that. Buyers (and lenders) can still manage to muck it up if they don't do their due diligence. You can't just set it and forget it with real estate. And similarly, you can't really do that with index funds either. Past performance & all that.
You're counting on the global equities market continuing to perform at the rate it has for the past 50 years. I can think of a few reasons why it won't.
It's weird how people always bring up the co-op thing, despite me pointing out that they're wrong over and over again. Well, I can certainly do it one more time. Moving into our co-op was a lifestyle decision that came with a price INCREASE, which we were willing to pay because we liked the neighbourhood and amenities. If we were not here, we would be paying LESS, not more. The reason? Co-op rent is pegged at a certain % of the market rent spectrum. When we rented previously, we would rent places much lower in the spectrum, because as minimalists and very non-materialistic people, our standards for rentals are eye-wateringly low - I don't want a place that's infested with vermin or falling to pieces around me, but otherwise, anything goes - basement? Fine. 200 square feet? Fine. 4th story walkup? Fine. Ugly as fuck? Fine. No kitchen? Whatever, I can piece it together with hot plates. Etc etc. None of that stuff even bothers me.
So as a recap, living in a co-op does NOT save us money, it costs us money instead. Living in a co-op is one of many lower cost options for non-buyers, but not the cheapest by far, and there are many others. If you're a good tenant and the type of person landlords like renting to, and not picky, you can generally do better than co-op pricing on the regular rental market.
Re: Location. My experiences have been mainly focused on the most expensive city in Canada, but I think it's fair to say that if any city has lower-paid workers, the city also has some option for lower cost rent, unless 100% of your fast food workers live under a bridge. The specific options would differ depending where you were, but I would bet there's always something out there.