As a tool for modeling and making architectural design concepts Blender has a lot to offer with the built-in options, but we can always expand it with the use of Add-ons. Some of the Add-ons for Blender will come pre-installed with the software, and you don’t have to make any additional downloads, and you should …
Source: Blender 2.8 CAD like features: TinyCAD • Blender 3D Architect
In blender, after I press F12 to render, the view changes. Is there a button or key that I can press to go back to the 3d view?
Source: interface – How can I return to the 3D view after rendering? – Blender Stack Exchange
Try this and let me know how it turns out.
Learn how to use portals to drastically speed up your interior renders.
Source: Using Portals to Accelerate your Render Times – Blender Guru