Draw the house once.
Lay the architect's plan underneath and trace it: walls, doors, windows, every socket at its height. To the centimetre.

Then furnish it.
Sofa, beds, kitchen, all true to size. Your buyers move them around until it feels like theirs. What fits here fits at home.

See it in 3D.
One click and the plan is a house. Lift the roof off, wait for the evening, see where the light falls.
And walk in.
Through the front door, past the sofa, out to the pool. Long before the first brick is laid.
And you get the plan back, furnished.
Your houses, with your name on them. Buyers open a link on their phone, take their time, and send you the finished plan with a photo of every room.