I don't know.
I suppose I would consider what 'waiting for him' is actually going to look like.
If this current childcare clash is going to be temporary then fine, what a couple more weeks. If its going to last indefinitely then, what's the point?
If it suits you to date someone who has similar restrictions to you, where you understand each other, then great. If it's going to lead to frustration and insecurity because you can only snatch odd evenings or a few hours here and there, is it worth it?
If you're turning down invites and the chance of a more realistic relationship (and that's what you want) then, no. But if you're happy to ride it out and see if it's got legs and you're not really fussed about how often you see each other, then wait.
In reality, when you meet someone online, you can't possibly know them well enough after 5 weeks to know if they're worth it. Each of you only knows what the other wants to show you. Eg you have no idea whether he is going out on dates with other women or hooking up with other women at the times you have your children but he doesn't.
If your children are very young and you will be reliant on finding childcare for the meet 10 years, is it worth it?
It's easy for other people to say if a man wants you in his life, he'll make time for you but,.realistically, if you both have the same time constraints - full time children and full time work, sometimes the time just isn't there to find no matter how much someome might want to.
In a situation like this, I'd be very pragmatic.