We are considering DC3. Dd is 4 and full time school. Ds is 2.5 and due to start full time in September (currently in nursery 3 days a week). Dparents help out a lot, bless them. Ddad has recently retired and both are really starting to "enjoy" their lives now, regular holidays, recent caravan purchase etc etc. I couldn't expect them to help out with a baby too. I went back to work when dd was 7 months, but left to become a SAHM 8 months later. Had ds in the meantime. Went back to work when ds was 18m old and was definately ready and am loving the balance I have now. It would probably mean putting very young dc3 into nursery and I already hate the thought and they're not even made yet! 
I suppose I'm just wondering, how do you all manage? Childcare wise? Did/do you have to put a young baby into nursery? How to you manage numerous pick ups/drop offs? And ultimately the emotions that come with leaving the baby at such a young age? Let alone getting you all out of the door on time