yah sounds novel.
instead of one school at one location, you have say 5-8 schools at one location. eg: something like the mega ITE at amk. then all facilities can be combined and well utilised. then the above mentioned like after school care and other things can all come together. there will be more interaction between all schools. CCAs can cross schools, and there will be critical mass to create niche CCAs like maybe fencing or what. and swimming pool within school compound.
best part is.. can boost TFR. because more chances of kids mixing and pro-creating. oops.
but will have 5-8 times the traffic when parents come and go.
There is no good or bad location. There is only good or bad price.