If you read carefully you will find that I have argued for doing
as much as you can sustain doing. (I have edited slightly to make that clearer, now.) At the same time, unlike yourself, I thought it a best marketing practice to encourage people to get started with good actions, not to sell them on saintliness immediately. "First get a yes," as salesmen say. Perhaps that seems like a bitter trick to you, but Aristotle advises that establishing the habit of good action takes time.
Also remember, you don't know my circumstances - I'm trying hard not to use a wheelchair now, for example, so I may not be as active as you. I'm not young. Kudos if your charity can be relentless.
So do note that my argument was a limited one, I was arguing in favor of at least some action, not trying to define ceilings other than what you can sustain doing. Which, as it turns out, over time - is actually the greatest possible effort one could offer.
Not to mention that homeless people are but one possible focus for charity so I can't accept your apparent insistence that I should devote all my energy to them exclusively; I spend far more time and effort trying to help the severely chronically ill in my own way and am not willing to give that up. If only because chronic illness often leads to homelessness.