Don't pay for outsourcing if you can get it for free: Here's just a few words about non-human automation... Much of the processes could be automated even withouth outsourcing. For example, you could establish community forums (already integrated with osDate) to setup member-to-member support, where members help each other out. Another example is cancellation of memberships which could also be automated easily.
Only paid Members of RentAFriend.com can contact you directly, so if someone contacts you and says they saw your profile on RentAfriend.com you know they are serious about meeting a new friend. Paid Members of RentAFriend can call, text, or message you through the website. You can write in your description how you would like to be contacted by the Members.
Hey John, yes you sure can use Wordpress on a live site with hundreds, thousands of members and visitors. As your site grows it's important to choose a hosting company that can support that type of traffic; you can start with shared hosting but as your traffic increase to the hundreds and millions :) you may want to move to a private server or vps.