Welcome to the forum, Crazyguy.
You're in a bit of a bind, I see. Besides what the others have said, I think you should consider moving to another location if that's possible. Being in a new town where the elders don't know you could relieve some of your stress. Do you work for a company that could transfer you to another place? If not, do you have a skill that is in demand so that if you start sending out resumes you might get a good job offer. Moving for a better employment opportunity is a great excuse.
Meanwhile, keep researching, but keep it to yourself at first. There are ways to make comments or ask questions so that the other party might start thinking. Be very kind to your wife. If you can, bring her flowers, take her on dates, and reassure her of your love and concern for the family. You have the advantage of being head of the household, so you can tell the children stories that might start them to looking at things from a broader perspective than the doom-and-gloom scenario presented by the JW's. I don't know how old your children are, but age-appropriate activities to encourage development of critical thinking skills would be very beneficial.
I hate to recommend dishonesty with your family, but, as others have pointed out, it's probably the only way to keep the family together at this point. I am NOT saying the recommendations I made in the previous paragraph would be dishonest, but that your doubts and research will have to be done in private. Years of brainwashing can't be reversed overnight, so be patient with your family.
Baby steps . . .