I use Architectural Desktop & HSB to model and export it to a VRML model that I can email to a client/architect/engineer. All they need is a simple browser plug-in to view. If the meeting is in person I bring paper plans to mark up and a laptop compuer so we can look at any aspect of the frame from any angle. I have the advantage of having done a lot of architectural design work with CAD. If you don't have CAD and CAD experience it will be expensive and take a while to get proficient with it.