New baby daycare question

When should I start researching this?

I made a preliminary inquiry into a Kindercare not a quarter mile from me, and for 3 full days a week of  infant daycare they quoted $173 or $692/month, which I thought was very reasonable!  (I am going to try and get my boss to agree to allow me to work 2 days from home).  So they said they could guarantee the price if I made a deposit in 30 days but I just feel like it's way too soon.

About when do I need to revisit this?