One interesting thing which I do consider, form economical point of view, as land plots on the map will be added and eventually things will be constructed on them, it will lead to increase of value of nearby land plots. More expensive constructions and lots plots in one place, will hopefully naturally evolve to more expensive town centers and cheaper regions of suburbs.
While it is a bit slow in terms things to show atm., I work currently on internal code, which relates to load and saving plus performance. It is a quite a bit of work, so it will still take a time. But it will be convenient, to be able save whole map of built rooms on plots and eventually buildings. This will obviously accelerate development. And be useful during eventual demo release.