Need help creating a 3D floor plan with AI

I’m trying to create a professional 3D floor plan for my Airbnb/Booking.com property so guests can easily see the layout. I tried using ChatGPT and other AIs, but they didn’t generate accurate results from photos.

So I changed my approach:
• I created a 3Dfloor plan (no furniture).
• Then I generated separate 3D room renders for each room.

Now I’m stuck on the last step:

👉 I want an AI tool that can take each 3D room render and place it correctly inside the 3D floor plan—basically assembling everything into one full 3D layout.
👉 Or I need the right prompt that will get ChatGPT (or any other AI) to combine the individual rooms into the 3D floor plan in a clean, accurate way.

Has anyone done this before?
Do you know a tool or a prompt that works for merging room-by-room 3D outputs into a single 3D model?

Any tips, workflows, or prompt examples would be super appreciated!