Interior design for a new house build

I am looking for an experienced interior designer to help me bring my vision for my new home to life. I'm aiming for a modern look and a feel of relaxation in the primary living space. I will be listing on Airbnb, so I need something reasonably neutral to avoid offending too many people. I need somebody who is creative and can provide high-quality results that fit my brief. I have some sites and a rough price range that we'll need to pick tiles, cabinets, benchtops etc. No need for furnishings or anything yet until the build is almost complete. I have engineered drawings to work off, which need to be followed, apart from the kitchen, which can be changed to flow a bit better as the current design is very basic. Once we've settled on some rough ideas, I'll need a 3d rendering of the kitchen and bathrooms to see the finished product.

I also need an idea of roughly how many hours this will take, or a set price is even better.