I really appreciate you putting your story out here, knowing that likely people will be buttholes. Your brother's story is important because he, more than others, represent true homelessness. I have been homeless. I am not a drunk. I don't use drugs. I work hard but like many others find myself one catastrophic incident away from not having a home.
I have a life-threatening illness and am disabled. I still work and have benefits. Despite that, the medical bills I will never hope to pay keep mounting. 
I grow/raise most of our food. We hunt and fish. I am up to my eyeballs in berries - canning, making jam, freezing and dehydrating. I forage for medicinal plants. My husband juggles getting me to town for work, for treatments and for running his own small business. 
Despite all the hard work we still often can't pay the power bill, pay our taxes, pay other bills in full. And we really don't have a lot of outrageous bills as we carefully scrimp and save. 
We are the face of homelessness.