If we're comparing free food to basic income, the comparison should be against basic income that's just enough to feed yourself. Somewhere around $1000/person.
Even if you want full basic income, I'd argue that $15,000 is high. As a (Canadian) student in an expensive city my living expenses (everything but tuition) are easily under $10,000 USD. Using the numbers you linked we're almost certainly talking about less than $8,000/person to keep everyone above the poverty line (the exact number depends on what the average family unit looks like, which I don't know).
I have a roommate (which really means shared kitchen, separate bedrooms and bathrooms).
New york is a really expensive place to live, the conclusion is that people who are relying on only basic income shouldn't live there. Likewise living alone is expensive. The conclusion is people living only on basic income shouldn't (especially if they are living somewhere which is already well above average pricing wise). Basic income isn't "everyone lives a luxurious life", it's "everyone can afford food, clothes, and a roof over their heads".
Even if you want full basic income, I'd argue that $15,000 is high. As a (Canadian) student in an expensive city my living expenses (everything but tuition) are easily under $10,000 USD. Using the numbers you linked we're almost certainly talking about less than $8,000/person to keep everyone above the poverty line (the exact number depends on what the average family unit looks like, which I don't know).
(All numbers per year)