You might also want to consider with the pre-school thing that as good as the one on one time will be, pre-school start/finish times seems to have a nasty habit of being at just the time your baby needs a nap so you are constantly waking them to take them for drop off or pick up numerous times a week. If you are trying to establish good sleeping routines this can be annoying. It is kind of good not being pressured to have to get out of the house the years before the whole pre-school routine begins. If you are having a bad day you just cancel everything and stay home which is hard once you have committed to pre-school.

We have a 28 mth gap and that seems to work quite well. DS is at kinder as well as family day care so I get a full day of one on one with DD. DD is down to 1 sleep a day so she will go down as soon as kinder pick up at lunch time is done so it works quite well.