If the reason for splitting the work between two Architectural Visualization studios is the costs, it means that you have not negotiated everything, or your expectations are higher than they should be for the budget you have. If you had arranged all the best, splitting the project between two studios may cause some further management problems on your side. If you have this as a real issue stopping you to approach your project, send us an e-mail at george@tallbox.co.uk, and we'll be happy to help with advice.