L.C.
My sister had 4 major changes in childcare arrangements in under a year --all, as you say, from 'outside their control.'
There is no single 'right' decision. Kids are happier and more settled in their own homes, with someone familiar and loving caring for them. It's finding someone familiar and loving... considering the money involved, it's often hard to get anyone capable who is willing.
There are excellent group childcare arrangements available, but there are many poor ones, too --guess which ones tend to have 'emergency' spots available?
I suggest taking some time in a quiet space, alone and undisturbed to think about what it is you want for your kids... specifically and generally, when it comes to how they are raised. Think about your family's values and how you want those transmitted. Think about the environment you want your kids in. Then make a 'wish list' for what would be ideal, in your mind. It might look like daydreaming, but it will give you a much better idea what (or who) you're looking for.
My sister quit her job. It was so stressful to constantly be under the gun to find something suitable, when she realized that she didn't have children so someone else could raise them... so she bit the bullet, learned a lot about frugal living and reorganized their finances so she could stay at home.