This is only putting out a feeler for what I need. I'm not ready or have the money to buy the equipment but I'd like to go down this route some time in the future. I see different posts on keg systems and it all confuses me. What exactly do I need and what is the minimum requirements to get me started? Can I buy the equipment in phases? I try and add something each week and that way I'm not spending vast fortunes every once in a while.