Russ:
Without actually trying it, I can't see why there would be any particular benefit to using a grinder like the ECGC12SL as a mixer, which is what you're really looking to do - mix all the ingredients together and create a more stable suspension.
How long were you thinking you'd need to leave everything in to mix? I am thinking 10-15 minutes tops, which would mean that there would be little chance for any evaporation to happen - which you do want, actually, water in the suspension increases viscosity significantly.
Most dried honey powder is a little honey and a lot of filler - usually maltodextrin. Good luck in finding something that is pure honey. I and others have been looking and we haven't found anything yet.
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@DiscoverChoc