Make a good drawing of the house you want to build. Use Photoshop to make images for wall papers and add detials like pictures on the wall. Make walls from squares, use transparency maps for door and window openings and displacement maps to simulate thickness abd recesses. Same for celings/floors. Build a separate library holding your 'house'. Define each wall/floor as a separate prop with it's correct position. Same holds for furniture. For rendering work cinematography style. Build open 'stages' as you need for the different scenes. Unless your images are as seen from the eyes of a character, you will find your ideal camera/light positions for the scene will invariably be outside the room.