lower the cost price for residential houses in a building. if raw material can be provided with automation. it would be more affordable. 1000 family houses cover space of a small town. 50 floors 20 buildings constructed by automation reduce the cost price thus more green space leave behind. roughly area 20/1000=%2 which is space covered by buildings. It's also proportion of saving on infrastructures like road pipe wire workforce. Automation is an important step for better future.
brick layer machine can be attached https://youtu.be/_e2TSzYfUKU Touch screen technology can help for exact location from approximately location. if lazer stop over a pad, it can show it's exact location and re adjust measurement. if x ray lazer is used, there is only one pad for all floors. :) CCD can be used instead of pad.
electricity comes to robots from sliding arms. its like slot car track and wifi for data connection.