$25,000 is a very reasonable existence for a single person, as long as it's present buying power and after tax.
You can rent for less than $1000 and should be able to do utilities for ~$300.
That leaves about $200 a week, which is certainly not the lap of luxury, but it's plenty for food and necessities (I've done 2 people eating well enough for ~$100 a week so I really don't feel full of shit saying that).
There's no planning for the future in that, but part of the idea of a basic income is to de-risk things like that no?
