I think the cost of x link is high and from what I hear not going to be a great fix - I think the paper superbill is probably cheaper and really going to work well. You will need to talk with a network guru about installing AC in the way you want as I am not overly familiar with how this works - you might try PMing someone like JAMESNT on the user board as he could answer if this is possible. I think you are on the right track and it will work well if you each have your own AC - I think it would be a mistake to try and put all in one database.