3D architect
Showing my age but 6 years ago I picked up a program titled 3D Home Architect that was pretty good. PC version of 3D Architect made by Broderbund; not sure what version is out there now. As an engineer I found it a little clunky but provide some good rollup of construction materials (costs were not very accurate as would be expected). I'd check out www. broderbund.com They make some programs for Mac but don't believe the 3D series has been migrated
There is also another program that goes by the same name that is terrible (not sure who made it but it was ugly!)
Good luck on your hunt,
regards
sugarray