She can marry someone who is blind or someone who is paralyzed for the sake of Allah!
Is she getting into a marriage or into charity works?
Marriage is all about love and care and fulfilling the rights. When a woman marries, her family also gets involved. Marrying such a person will not bring joy to her family.
Such a boy can find many girls who are like him with disabilities to marry him and complete one another.

shaikh as i asked a question earlier regarding marrying a boy younger than me.who is 18 only.you suggested not to marry him. shaikh than who will marry him? majority of the girls don’t want to marry any person who seems little abnormal( he is actually not) if the girls want this to do for the sake of Allah,her family is religious.they have their own islamic institute.