This is a big snake male or female... What are you planning to house this thing in when its grown. A male averages at 11-15 feet how is that not big to you? Expect it to be at least at 7-10 feet by a year old. From what your saying a 17 foot female is to big for you but a 15 foot male wouldn't be? Do you have any experience with large snakes?
I think you should think this over its a huge responsibility.