Escape room prototype

My project is for a prototype to sell into a client. It is to act as teaser. Ultimately the full game will be 3D single and multi-player, one hour long,10 puzzles in English to specific design. This prototype should be 2 puzzles, in top end design, custom branded. The player age range is 16+ for commercial services. We will supply content specifications for the puzzles and the scenario. The room could be office based or a fantasy castle – ball park Budget please and of course I'll answer further queries