Adeline, rationalise with your hubby. Going to a cc has more pros than cons (falling sick) - Darius will be having fun with friends and learning independence (things that we are lazy to teach at home e.g. self feeding). By 18 mos (I suppose some mummies here with older kids may agree with me), the kids will be totally restless, screaming/running at home, and what are they going to do at home facing a grandparent or maid? They won't and don't know how to teach, end up the kid either learns very bad english or picks up bad habits and got no chance to be independent. You can ask your hubby why he wants to keep Darius at home? Based on what? Or ask him to give you/Darius a chance - go first, if really not suitable or you are always stuck at work and late to pick him, then take him out of cc. The later you send them to school, I think the kids will find it harder to adapt. Imagine if he goes to N1 and his classmates are already very independent and have their own cliques. And he's the only one struggling to adapt and cry. Unless you send him to places like half day kindergartens or Chiltern House which has programs from Nursery 1 onwards then all the kids are new in the class/school. You know my son goes to JG now, yesterday afternoon he surprised me by repeating the music/dance moves he learnt in school (shake butt, wave arms in the air, clap hands and turn around and fell down haha!) while watching tv. When Darius learns and comes home to show you, it's going to be delightful.
If your office is at Cantonment, Pinnacle has a very nice cc ;-)