Basic WooCommerce WP Integration

NOTE: MUST be able to show a similar working example live on the Internet, not a demo site! Need a WooCommerce expert to do a small job which could lead to ongoing work. This should be a fairly small job to someone who knows this. We have a WP site which simply does marketing for us and a Yii 1.0 app which doesn't have any billing/subscription components built in. We would like to build an integration between the two. Everything is already built and we will provide a db template that you can work with. You do not need to build anything in mysql, everything is already done and working. We only need the integration between the two based on the document that we will provide. The integration will require manipulating only 8 db columns in order to make this work. WooCommerce will take care of the subscriptions and purchases as it normally does but would use this integration in order to read/write the fields it needs to know about in order to maintain. Will NOT pay anything in advance so don't bid if you are that type. We pay in two milestones. Part one, show something working which needs to be fine tuned, completed, polished up. This means that if something goes wrong and we need to hire someone, they don't have to start from scratch. Part two. Complete the project, everything working perfectly. I will have two other programmers look at the code to make sure they are happy with the work and if so, we will release the second milestone. If you do a good job at a reasonable price initially, we may want to continue working with you and adding more into our integration.