The broad breasted turkey is very similar to the Cornish X chicken, developed to live a limited amount of time and be harvested. They are not designed to live a long time. A lot of the research that goes into Broad breasted turkeys and Cornish X chickens is in how to keep the breeding flocks alive and healthy enough to provide hatching eggs. It is a delicate balance and I don't have access to those studies. A lot of research is in how to just keep them alive and healthy until they even reach butcher size. If you read the above posts I think you can see that reflected in their comments.
It is your turkey and you can do as you wish. Plenty of people try to keep Cornish X alive as pets or as a breeding project so you won't be alone in your efforts. Since trying to keep a broad breasted turkey alive requires pretty specialized knowledge you might start a thread in the "Turkey" section of this forum. I'll provide a link.
https://www.backyardchickens.com/forums/turkeys.20/
It is your turkey and you can do as you wish. Plenty of people try to keep Cornish X alive as pets or as a breeding project so you won't be alone in your efforts. Since trying to keep a broad breasted turkey alive requires pretty specialized knowledge you might start a thread in the "Turkey" section of this forum. I'll provide a link.
https://www.backyardchickens.com/forums/turkeys.20/