Yes, you can keep a male retic around 10' with healthy, controlled feeding. Vital Exotics routinely keeps their breeding age males at or around the 10' mark. Just keep in mind that a 10' retic is a big, powerful, smart and quick animal. They are not like burms or boas in how they move. They are calculating and fast.I'm not trying to dissuade you from a retic. I truly believe that the purpose of this forum is not to pressure a person one way or another, but only to provide information and let the individual decide. Are most 15 year olds ready to own a retic? Likely not. But some are, and you might be. If you have the money, support from parents and can provide all the appropriate husbandry and care then go for it. Just be aware that these giants are unlike any other species. That being said, if you do decide to buy one have fun and enjoy it. There's nothing quite like owning a giant. Don't be afraid to come back here for help or to ask questions. You might get some snarky remarks along the way, but there are many of us on here who will provide realistic information without judging.