>A 45-story building is much more expensive than 9 5-story buildings
Including land costs, is that really true? I sort of doubt it, since those sorts of high rises are built in cities where land prices aren't that high.
> You really want your housing, jobs, education, retail, and leisure spread around such that people can conduct most or all of their daily affairs on foot.
Don't you want the opposite of that? If it is spread, you spend more time traveling. Public transit that is spread out is very hard to accomplish. Cities with that stuff all spread out are car cities.