Here is my experience, and not to sound negative because I do like turkeys....
They can and will catch just about anything that blows by as far as illness is concerned. They are more susceptible to many diseases than your other poultry. I would keep a bottle of Tylan 50 injectable on hand and use it orally if you see her sinuses starting to swell.
Being that she came from a commercial farm and had lived long enough in those conditions, she is likely well medicated already.
It is nice that you want to give her a better life. I too disagree with the way our commercial poultry are raised. We should all learn more about growing and raising our own food. The country would probably be healthier as a whole if we did.
Good luck. It looks like she is happy in her new digs.