from your questions i may not be able to answer all of them but here is my take on how Sbs could do this mechanic
A 1-4: i would think that the construction and building would be similar to Ark: survival evolved, as to weather or not there is a limit on how much you can build. Ex.(can only build in a small area to be your home) it could be based on social standing like a peasant would have a small area, while a noble can build in a large area like a castle.
A 5:this i do not have any insight to what you are referring to. is there an example of a game that does this mechanic?
