Stressing! Am I wrong for this ?

Carol •
My wife and I have been trying to find a donor for our second baby and this time around is so much harder. 
For our first baby, she carried. Our known donor was my brother ( we wanted the baby to be blood related to me). I was blessed with such an incredible bond with my brother. When I asked he never hesitated. He came over, did his thing in a cup and went about his business. It took about 4-5 try's because we weren't really tracking anything. 
It took me a while to be ready to carry, mainly because I was scared idk. We have a couple of willing friends but they all asked to be a part of the child's life, and I'm not sure how I feel about that. I'm ok with them being a cool uncle but not a "dad". So, here's where we're stuck. I don't want to share custody with anyone other than my wife. Am I wrong for this?Â