If you have just 1,000 in your group, each of whom has paid US$ 50 (for one year subscriptions), you start earning US$ 1,000 per month for 12 months. That’s US$ 12,000 for the year. Chances are that you will start earning this amount in no time. Because now you are looking at Ten10Ten.
You also earn if there are 500 in the group. If they have subscribed to US$ 50 subscriptions, you earn US$ 500 per month for 1 year. You should be able to manage this within a few weeks really, and then see the money coming in.