Hello,
Situation is like this, I can design electronics for your Smart outlet, printed circuit board will be small so it can be placed in wall together with outlet and powered by mains.
But because of my college tasks I cant do this fast enough so I placed as bid lowest possible price, and can you please tell me do you plan to create those smart outlets in large numbers or just for yourself?
Also we can discuss further details so I can even make 3D model for you, so feel free to contact me.
Best regards from Croatia,
Bojan Jakovljević