Hello Sir,
I checked you request of looking for a programmer to solve your issues in relate to updating to version 7, add ticket module and customer page with knowledge base, load existing content in the updated version, and have it ready for setup in Linux server.
We had carried out projects in and out freelancer with regards to vTiger, we also have developers who are experienced and knowledgeable about this so we can help you with this without any hassle.
Kindly send us a message to further discuss this request of yours Sir