Thanks in advance!
You should have posted on the service section, not sure if your account has the privilege to do so.
Auto forwarding might not work for you because you said you receive small earnings in the wallet. If itis micropayment, then your fees for transacting would exceed your single small payment.
You will have to wait till it is large enough that it can pay for its own transaction's / forwarding's fee. If the pvk is compromised, the hacker would be looking to do the same thing as well.
Setting up an auto forwarding should be easy though. A simple api function set up on a 24/7 vps could do the job.