They had the day care here when I first started having a family, and I found it too expensive at that time, for one thing, and once my children were of school age it didn't make sense for them to be in downtown Ottawa; I'd rather have them close to their school and home. It didn't make sense to me, so I never really considered it. It may be different for MPs who live downtown; I don't know.
I'm not sure what you mean by the bus system. Do you mean the House of Commons buses?