I think i see what your saying.
Unrequired land, basically paying extra for the land that doeant make a difference to more properties, maybe it just increases potential price of the larger subdivisions, however mayne not enough to be worth it?
Never too big surely?
Im personally looking for something locally where i can rent the property out so needs to be decent house, decent area to attract the right tenants but something with also subdivision/developmental potential down the track (has to be proposed though).