I'm just embarking on setting up a CNC mill and need to get a cad/cam suite. I have over twenty years experience in manual machining and am very computer savvy, but I'm completely new to CNC. I don't expect to get anything for nothing, but is there a half decent 3d cad program suitable for novices? I've taken a look at quite a few of the introductory free trial offers, but while I'm aware that you don't get "owt fer nowt", the pricing for many is at best opaque. I don't really want to spend more than £100 GBP on a cad program (to start with, but may decide to upgrade to something more sophisticated at a later stage) and haven't thought about the cost of cam yet, but I'm open to all suggestions.