suggested:\
Which CAD program is good to draw the outside of a house?
Found out that the only architectural CAD progs are AutoCAD and Revit.
Revit https://en.wikibooks.org/wiki/Revit_User's_Manual
AutoCAD
https://en.wikibooks.org/wiki/AutoCAD
Revit is $200 per month.
AutoCAD is free for students.