For the most of 2024 and the beginning of 2025, I have been working on my own robowaifu design. I call her Galatea. The design is very easy to build with the instructions and files, and is relatively very cheap, less than $400 to make. It's also very customizable, you can choose the color, dress, hair, and even AI.
I intend this to be the Model T of humanoid robots and robotic companions, while it is not the most complex, it is easy to mass produce and cheap.