I need my pop-up shop design in 3D

I'm a university student studying fashion marketing, and for one of my models i have to produce a pop-up instalment at the Orangery in Kensington. To help my presentation and explain it further, I want to create a 3D image/drawing of it.

My idea: It will be a large white sphere model (with black alluminium strips around the side to create a bird nest effect) I also want a transparent black tunnel that will be a long entrance walk into the pop up but will also hold the reception.

Inside there will also be a square section where ballerina dancers will be, seats will be around the square for visitors to sit and look around.

Spread around the outside will be an exhibition of five dresses (bridal)

I'm not sure what size would be best as i'm not a professional? but It needs to be spacious for people to move.