what is the best way to start a service discussion area on my site?

Here is what I am looking to do and I need some advice on the best tools to accomplish it. I want to set up a service discussion area where people come to talk about how to service a specific type and model of medical equipment. Once they come I would like to offer our expert help free a long with, parts, service, and videos that show them how to do things. these videos my be accessed only once for a small fee.
I would need some kind of remote access for the service help we offer (my service guys may be on site or in the shop when we get a request they would need access on their cell phones to give and answer and maybe a link to the part the person may need)
Never done this before so input is truly welcome. Thanks to all ahead of time!!