I've got to say, there's a lot about this situation that doesn't add up. Unless you are extremely young, I can't imagine how someone who qualified to be an Elder could be so lost as to what to do. Hopefully you are just being overly dramatic about your situation and things aren't as bleak as you describe.
Assuming this is all true, it seems to me that if in fact you are losing your place of residence and your employment because of a change in your religious belief, you very likely could have a legal case against those who are discriminating against you.
I'd go to the local police and explain your situation and ask them what would happen if your parents told you to leave but you refused to go. It may be that they would do nothing in a case like this and especially so if they know the situation in advance. This could buy you some time to find another place to live.
I'd also look into free legal advice that may be available in your community or one nearby organization that advocates for those being discriminated against and find out what your rights are if an employer fires you because of religious reasons. I'm sure there is a government/labor/ human rights kind of agency in your area that might be interested in knowing what your are going through. You knew enough to set up a gofundme account, it seems to me you'd know that a few well placed Google searches could tell you everything you need to know in terms of human rights and employee rights. Armed with this information, you may be able to go to your employer and show him what he will be up against if he fires you. I'm assuming that up to this point he has been satisfied with your work. It would be highly suspect if he were suddenly claim he wasn't satisfied with it and have it coincide with your leaving the Witnesses. You could also let him know that if need be you'll be informing his customers what he's doing to you.
If any of this is true, it seems like you are allowing this to happen to you as if you are powerless. My goodness, you are virtually letting them run you out of town. These folks only have as much power as you give them. You sound as if you've given your self over to them and are making it easy for them to walk all over you. I'd say no more about your thoughts about the beliefs of Jehovah's Witnesses or discuss anything with them until you have your head together, know your rights and have a plan.
In the end, it sounds as if it is high time you got shaken out of your postage stamp sized JW fueled dream world. If this is a hoax, hope you had fun.