I would wait until the spring to get your polish and get at least two. They have a tendency to get picked on in a mixed flock because they look different, so one on her own might end up a loner. It's also better to integrate two or more into an established flock rather than a lone bird.
Integrating new birds into a flock in the winter just makes the task that much more difficult.
Integrating new birds into a flock in the winter just makes the task that much more difficult.