3D Map asset for unity3D platform

Example of result you need to delivered to us (unity package)
https://assetstore.unity.com/packages/3d/environments/roadways/megapoly-art-boxycity-220546#content

Example of 3D world we want to build : (please open with computer, not mobile)

https://3d.radiocaca.com/
+ Play as guest
+ Press enter
+ Press Y
+ Go to fifa world cup on the right
+ Select VIP Lounge

We want to build a vip lounge same same like that

- You free to use assets of item from free assets online (example from https://assetstore.unity.com/ )
- We want to create 5 objects dedicated to us (3D object)
- The 3D Map should be exact the size of vip lounge mentions above

Please dont ask for our budget, proposal your budget with specify
- Cost to build the environment
- Cost to build 5 3D object (can be seperate to other project as well)
- Cost to decor the environment so its look like a casino on a spaceship

Feel free to ask anyquestion
P/s: We dont need you to develope anything, we just need you to design the environment and assets
Thank you