Hello:
Its a good idea but i am concerned about the costs involved, a setup required for Birthday would be entirely different then a setup required for Photo shoot, or even galleries. most likely you will be switching from one layout to another. in simple word everyday you will be changing your interior from one to another and most businesses cant afford to change interior for years.
You need to consider these points
1) You need to factor in structural change costs involved per layout - and how you will convince your clients to pay for it.
2) How many employees you need - are they part time - flexible hours or full time, and can you afford full time employees.
3) Do you have enough space for type of service you are offering, such as a photo shoot would require small space but wedding!!!! will it fit?
4) Contractors and suppliers
Obviously for your business model to be successful you need to cover all structural and labout costs from your clients, so i think you need to narrow things down at this stage e.g. start with limited services such as you only offer photoshoot service, birthday service, memorial services, corporate events, nothing else at this stage. and among each of these services you have silver , gold and platenium packages, customers have to choose from these only. and each offers 1,2,3,4,5, things, you see this way you know exactly what you CAN offer and your clients know what they WILL get.
I hope it helped.
Thanks