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I'd say you have a good chance as far as the term of the alimony but the amount of the alimony depends on your husband's income level, your abililty to be self supporting and other factors. Hard to say what is reasonable without looking at that and other factors in your divorce.
If you consult a local attorney they can give an idea of what is reasonable in your specific situation.
Call the local bar association in your area and explain your situation. They can direct you to an attorney who will be able to help you. And yes - you are correct - divorce can be an expensive process, but if you speak to the attorney beforehand, they can take steps towards controlling the costs.