There are others that do that, where they don't tend to rehome/sell adults because they consider each animal a pet. It's understandable after having an animal for years that you become attached and want to keep it, even when it no longer makes sense to breed it. Personally, I try to keep it in mind that the animals do not get a personal attachment to me like I do them, and the most important thing is making sure that if I do rehome them for any reason, I vet the people taking/buying them very carefully to make sure they will provide the same standard of care that I do. So if it ever comes to that point for you where you need to thin out what you have for any reason, you can still be very choosey who you give/sell them to. I do my best to limit things incoming so it's less heartbreaking having to rehome later on, which includes rehoming relatively quickly after 90 day quarantine animals that I have taken in to help, or animals in a collection purchase (when a person wants to sell all their animals as a group and I want some of them) that I don't really have good breeding plans for.
So take your time choosing animals to start projects withIt's very much worth it in the long run to have a solid plan. Mahogany is such an amazing morph to work with for so many things, so it may be worth holding off just a bit to see if there is a combo you could use for more than just one project!