Hello,
I am industrial designer, so I can help you.
I can design the modular doll house for you in solidworks. I will provide 3D files for you like: solidworks source files, .step, .stl and . igs for each part.
I will provide the drawings for each part in .pdf format and .dxf for laser cutting.
I will assign a unique code for each part, so you can assemble all of the parts together easily.
Let me help you.
My portfolio: https://www.freelancer.com/u/bordbar
I look forward to hear from you.
Best Regards.