Hi, I am highly experienced with your job request and can guarantee you FASTEST modelling time.
I will use V-ray for your walkthrough renders which will give you realistic video renders.
I can also provide you with even more detailed and post-processed image renders and plans for your project.
Software I use (for your reference) : AutoCAD, 3Ds Max, Revit, Rhino 7, Sketchup, V-ray, Unreal Engine, Adobe Suite (Photoshop, Illustrator, InDesign & Premiere Pro).
I use high quality PBR materials & high poly models to get high quality renders.
I'll be in constant contact with you for updates regarding your project and ensure you the best output as per your requirements.
YOU CAN SPECIFICALLY REQUEST FOR THE TYPE OF SOFTWARE I SHOULD USE FOR YOUR CONVENIENCE. Just so that you can use the original CAD file for modifications.
The number of hours required for this project can vary depending on the level of detail of your model and the length of your walkthrough. I'll give you an estimated time required for a specific task (like modelling, materials, lighting, scene-setup, and rendering) once I get the clear idea of your design and requirements. I can also post process your output images and videos using Adobe Suite to make it more appealing.