thank you for this project,
1)what is the Area of the buildings?
2)how many stories?
3)working drawings are available?
4)can you provide image of the plans and elevation, now?
5)what kind of building? residential, commercial, hospital ?
as you know for 3d modeling it needs much detailing, we required detail working drawings and sections of elements in detail,
if you finalize soon you can get result soon, and if you want fast work we can provide simple rendering with natural day light system, i will send you sample of building which is simple rending, Please check in PM. if you tell us the detail then we may reduce the bid amount