Application for 3D Construction-ish Design?

I'm looking for an application to do construction-ish design.

Specifically, something that gives me 3D view (wireframe / flat rendering is fine) of things like a greenhouse, furniture, etc.

Now, I know I can do this type of thing in Blender, POVRAY, or a million others, but I'd like a nice, simple interface to work with, and I find that most 3D rendering programs seem to have an overly complicated interface for the simple features I need.

Does anyone know of such an application?

Thanks in advance!

It sounds like you need a CAD program. CYCAS may fit what you are looking for.

Hello,
I also don't know about Application for 3D Construction-ish Design so I also ask any one .


Thanks
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curtains