Unreal Engine or Twin Motion

Hello. I am preparing a 3D proyect of a museum and I would need someone to help me with unreal engine or twinmotion so people can make live tours throuh the building on the internet. The virtual museum es medium sized. 4 or 5 exhibition rooms and includes an auditorium room. Probably we will be needing two virtual tours separately, one of the museum and one of the auditorium. All the design and 3d builiding will be provided. I would neet a budget and aproximate time needed for making this job. Thanks!