A multiplayer escape room in VR

My name is Tora, I used to run one of the first VR arcades in Gothenburg, Sweden! (Before Corona) I am currently working on a project but i am terrible at Unity and would gladly pay somebody to create the game for me. The concept is an Escape room with 4-10 players. Four rooms furnished with relevant items for: Outside of a building (think richies plank experience) Spawn point Conference room Kitchen Serverroom Hallway Office The game will take around 1,5 hours to play and it will need a lot of details. The game also has a story and is divided into three chunks where the players get an individual questionnaire after each part where the result from their response gets uploaded somewhere accessible during the play. I Want help with everything from scratch. models, audio and coding :) It is a large project and will take time. I need to know from somebody experienced how much time and money we are talking about. Thanks!