It is unethical to purchase a product with the sole intention to sale it to another for a profit with this particular product. If you were to tell Apple that you were buying it just to resale it for profit, the possibility would lay that they would tell you to kick rocks.
Your situation, however, is an exception!! You're not trying to obtain one to uphold a plush lifestyle but to SURVIVE!! BIG DIFFERENCE! I personally wish you had 100 iPad 2s with you to make a profit. I am irritated at scalpers making it hard for buyers that want to buy for their personal use but that's another story.
OP I've been and absolutely know what you're going through. This isn't the place to spell all of that out but I understand.
So like I said you do what you have to do to take care of your family because nobody, I mean nobody else will.