I agree. Yes, the answers to your questions are.

1. Yes, I would do a girl in a wheelchair, especially that one.
2. No it is not imoral. Just because she is handicapped doesn't mean she is not entitled to a full and loving (albeit raunch sex filled) relationship.
3. No, you are not going to hell. for those thoughts. She isn't a blight on society, or a preteen. She is a living breathing woman. You can coat her with a nice covering of sperm just like any other. It's sticks to handicapped skin just as well as non-handicapped skin.