I've had many inquiries like this...

I get responses like, "I have a 2 yo that needs care", and that's it...or, "we need a full time space in October" with no other information.

I think that a lot of people are just inept at electronic communication. I very nearly passed on an interview because the mother was so abrupt with our email correspondence that she wasn't even answering my questions. They honestly turned out to be an amazing family, and the mom was so much like me that I could have been friends with her. She just sucked at text and emails.

I would totally call.