"What's the best way to interest busy consultants ... ?"

As a busy consultant myself, I can say that you missed an opportunity right here. I read your question from start to finish, but it told me NOTHING about what you offer.

By the end of the paragraph, all I know is that you're trying to sell some sort of "managed service" with "custom solutions" for $10,000. Really, you couldn't be more vague. And there's nothing here to entice a customer.

Maybe I'm not your target customer. Still, inasmuch as you're asking for advice, your "elevator pitch" ought to explain what it is that you do. What exactly are you trying to sell / offer?

Whether the service is attractive to potential customers or not I can't say. However, it's clear that your pitch needs a LOT of work. An elevator pitch isn't just for potential customers or investors. You need a simple way of introducing / explaining yourself, regardless of the audience.

That's something I can help you with, if you're interested.