In the meanwhile, I would normalize that it is okay to be nervous about stuff (don’t focus on potty training), and that mommy and daddy (or whatever parents) get nervous about things, too.
Keep focusing on, no matter what, you are going to take care of him and it will be OKAY.
Why?
Potty training requires relaxation and where does relaxation come from? The parent/child connection.
He is getting there, I am seeing all the signs.
Your job is just to enjoy him, keep gently challenging his nervousness, and love him through it.
You are.
Can a daycare with this ratio work well? Sure.
But children this age are meant to be oriented to their caregivers, not other children.
It is unreasonable for children this age to play together well all day.
If you think you should look around, then do it.
Find this over on The Washington Post