Welcome to the community. I'm so sorry to hear that you've been through as much as you have. We don't have all the answers here either, but I for one am always willing to listen. Sounds like you have some tough decisions ahead. If you haven't come across it yet, this website looks like a great place to get more information on help that's available for you and your family - Assistance for Unemployed California.
I think Atheism is something that is growing in this country. Maybe there have been Atheists all along, but people are just now coming out and being open about who they are and what they do and don't believe. I think Atheism is the new "gay" where is has taken the gay community decades to be accepted and they are still fighting a tough battle. We will be for years to come. Many Christians don't think of Atheism as a legitimate protected belief when it comes to freedom of religion. They'll protect anything but "no religion."
I'm sorry you and your family have had to deal with such a hard blow. I think it's terrible that Christians think it's ok to shun people this way rather than respect your beliefs and wish you the best. From personal experience, I think many of them feel personally betrayed in these kinds of cases because they've made it their life's work to shepherd people into the flock, but they don't know how to handle it when someone in their flock wants to leave. They are offended and it's really beyond their comprehension how you could know all the same things they know and come to a different conclusion. I'm like you though...it just doesn't add up when you use logic. I also don't like feeling like there is always something weighing me down, looking over my shoulder, and judging me.
Atheists need to open up more with each other so we know we're not alone. I wish you well.