The cost of 3D design depends on several factors, such as the complexity of the project, the level of detail required and the required duration of the project. To get an accurate quote, please provide your project description accurately and in detail to the 3D design service provider. Also, ask in the estimate if the price includes all necessary revision rounds and other possible additional costs. Don't be afraid to repeatedly ask for a quote from different service providers to find the best value for money.