One thing I don't understand is why homebrew shops don't make starters for you. That would be convenient. ALso if they pre-crushed your recipe and had that ready to go with any hops required as well.
This is a bad idea for so many reasons. If you want the stuff handed to you, buy a kit. I buy in bulk, size my starters to be exactly what I need, and crush my grain the same way each time. If they do it for me I can't control any of it nor be guaranteed they even did it properly.