Do some 3D Modelling

Hello. I would like creating two "artist's impression" images (from different angles) and a 20 second simulated flyby video of a large photo mosaic and an accompanying medieval-style tower. The photo mosaic will lie flat on the ground near the foot of the tower, portray Robin Hood and be 50m wide x 25m deep. The tower itself will be 40m high x 6m deep x 6m wide and be composed of traditional-style medieval stone. It will be light sandstone in colour and have open-air battlements at the top. 1.5m below the top of the tower will be a 2m high viewing window that will go all the way round the tower. This will allow visitors to climb almost to the top and observe the view without being affected by the weather. I have created simple sketchup files of the proposed tower (which I can provide if necessary) but I need a professional job and would be grateful to see quotes and portfolios. The proposed location is on top of the hill shown in the attached images. The mosaic could be placed between the tower and the forest or at the side of the tower. I could also supply a draft image of Robin Hood but if you could do that then from Shutterstock, etc., all the better. Please feel free to email me with any queries. Thanks for your time.