If you have the patience and love necessary to take care of this dog, assuming he does end up with "special needs," as well as the money for surgery if he eventually needs it, then I would say go for it. He deserves a loving home just like any other dog and, since you seem to love boxers so much, you might just be the right Mom for him. I have a special needs dog and she's just a delight. Certainly a challenge at times, but it doesn't make us love her or enjoy her any less. Your heart should steer you in the right direction!
"Happiness is a warm puppy."