That image is excellent too!! As you say a large model takes a long time to render - but it is worth the wait as your image prove.
Your settings are the same as mine except that I use Quality 5 if I have many lights and windows too. Unfortunately windows that introduce dayight cause issues - I hope the next patch/version fixes them!
The Advanced render creates the whole model, even if you are only showing one room, which is what takes the time. Have you used the Modify Viewpoint? Using that, you only render the radiosity part once, then reposition the view and do the Raytrace section, so it only takes a few moments for all the following views. As long as you change the names of the file each time in between, then you can get as many image angles as you want without doing the Radiosity again.
Keep up the good work - and let us see some more images of the project when you have some ready.
Allan