Got a similar situation but way less acres. It is self sustaining but you can’t just keep blasting birds. We release 20 birds on Thanksgiving, the only day it gets party hunted. Everyone gets to shoot without worrying about killing the wild birds. We never get them all. This is the only day some shoot a gun the whole year. Not sure how many make it to breed or be around next season. I think very few. Over 6 years we’ve done this and the breeding resident population has been steady or increasing. This with shooting around 6 wild birds a year. Sans releasing birds, I would not feel comfortable with 4 guys showing up to hunt, possibly each shooting their 2 bird limit and wounding losing a couple more. That combined with a weather event and other natural mortality could really hurt. In a nutshell shell we get to enjoy a big hunt day, especially the rubes, without smashing the wild pop.