I can afford it. It will cost me a lot of money because I'm barely on the tall end of that hypothetical situation right now, but I can put my part in.
I can afford it because a healthy society is a productive society, and this will return to me because good economies are built largely upon productive societies, and healthy societies are more productive than unhealthy societies are.
Productivity generates wealth.
Are these not things that we generally understand to be true?
(Unless... Can it instead be shown that it is economically beneficial to have a relatively unhealthy and unproductive society?)
[Shall I make popcorn?]
(edit, can't reply further because of HN thread limits:
My dudes, "free" money from UBI isn't to keep people from working who want to get ahead. Most people can work, and most people do want a lot more than a shitty apartment in their life and are willing to work for that.
Y'all certainly want more than shitty apartment in your own lives, don't you? So why in the fuck would you ever assume that "dur, I have a shitty apartment and some simple food, so I don't have to do anything ever!" is the be-all, end-all human state?
Please re-align yourselves with the people you actually-know in life: I promise you that you'll see that almost none of them will give up on the rat-race if they start getting UBI. They'll generally want to keep making steps that seek to bring them ahead of their peers, and that means that they'll continue to do productive things. A thousand dollars per month (or whatever) isn't enough motivation for them to somehow cease being productive and stop working to get ahead.
There is no proposal for UBI that means the end of the fantastic American dream. UBI doesn't even mean the end of capitalism. UBI just creates a baseline financial safety net onto which anyone may fall without necessarily facing disease and death in the gutter, and it's there for everyone without even a shred of additional paperwork because it exists like clockwork without additional action on the part of the recipient, while also providing a bit of a boost for those at the low-end who do produce something that lets them get ahead of the game a little bit easier.)