Honestly, I don’t see why you wouldn’t just do this in MAX. MAX does video quite well. The only reason I can see to use a game engine for this purpose is to create an interactive experience.
However, a walkthrough would be very cool in UE4, using the Realistic Rendering sample as a starting point. Think of it: Your clients can walk up, open the front door, tour the building. Then head outside to tour the grounds. All at their leisure. Using triggers you can set up pop-up informational blurbs - room sizes, notes about customization options, selling points (like “the skylights in the kitchen let the sun in to brighten your meal times!”), etc.