My daycare children are all over 2y.o. by april, no more "babies". Although, last summer I had 3 under 15 months and I thought it was hard, good thing it wasn't winter.. having to dress them all :/ but that was ME. You'll figure out what is best for YOU. One of my co-daycare friend has 5 under 18 months and she can do it no prob.
Concerning part-time versus full-time, as I am private daycare I can't afford part-time, hey I got a family to feed and bills to pay too... I don't take part-time. If there is no other daycare available for them or other request there for me, I'll take them but temporally.
Again it's up to you and your needs really !!![]()