@Rallen 

Yes, the thing with the Deco units is that the remote satallite units do not need to be near the "main" Deco, but can chain together. So you will have the Deco M4R in the basement, then the first M3W on the first floor, and then the second M3W on the second floor. 

You will probably need to mess with the positioning as ideally you want the device to be above the other, but that is not practical.