Hi Joe
The big program is SolidBuilders it is guaranteed to a 1/64" of an inch I have had it for 4
years. There rendering program is called Virtual Image
Punch I have had for 6 years Punch has a nice rendering.
I build the home in punch an render it for the customer then build it in SolidBuilders
Here is one we just got the KO for today

I set up the database the way we build a house.
I set up 4 databases for the Co's we use and each lumber yards we use.It took me about year an a half to do it.
A lot of Co's are setting up there database where I can go into there database an with a push of a bottom I get there prices all at one time