Hi there, my name is Vanessa, civil engineer and interior designer. I read your project description and I would love to help. How? Well, I can offer to you 3D model and drawings. How this will help you? Let me explain each product..
The 3D model is going to be more useful for you, it will help in choosing the finishing (tiles for example), textures, type of plumbing fixtures, etc. With this, you can see what is going to suit best for you bathroom.
2D drawings are for the contractors. Floor plans and elevation that give every single detail they need to consider in making their bid. Also, in each drawing I can add list of materials, so the contractors also can check that. (If you want I can add too a list of material in excel).
I really hope you consider my proposal, I will be glad to help.
Regards.