is google sketchup s good place to get objects then import them to unity?
Id Say No because when i tried it out it kept glitching and getting rid of random parts of objects.
i sugest 3ds max. even though google sketchup has an excellent library, it still doesn’t work well with unity3d.
I actually just set this up myself today to import stuff from sketchup, use PlayUp Tools. It even imports the textures. 
thanks