Asterisk FreePBX & A2Billing Assistance - Project 1

We are currently building a A2Billing Platform Server for our Asterisk Server. Both Servers are located on a Public IP in the same room. Asterisk is working correctly so no work is needed there. A2B is installed and 'talking' to Asterisk now. A2B also has asterisk installed. However, there are small issues we need to fix in A2B configuration. What I'd like to do is find freelancers that would be willing to work on A2B on a per issue basis. In other words, I would post what I need done, you would configure or make adjustment accordingly. As each part is done, payment will be released and we'll go on to the next part. I don't want to hire by hourly rate. Your bid should be only to complete the desired work as specified. Below is my first project. Others will be posted in the same fashion. Project 1: We need you to configure two SIP extensions that register to A2B.. This requires adding extension to A2B and FreePBX. One will be prepaid and the other [login to view URL] extension can make calls anywhere in the USA. On post paid extension, A2B should not prompt or speak until the the owner has become 30 days past due. On the prepaid, it would announce the minutes left and then complete the call. When there is no minutes left, A2B will stop any additional calls. Other configurations: Allow for these two extension to call each other without change, like an intercom. Allow both of these extensions to create a call forwarding. Allow these extension to create and use speed-dials Allow these extension to purchase additional DID's from our pool of spares. Allow these extension to make payments using PayPal manually and/or Automatically using cront. When bidding, please add "I know A2Billing" in your bid so I know you are not a Robot. This is one of many related projects. We are looking for someone that complete these tasks timely and on budget. If you have any questions please fill free to message me. Thanks, Bart