Re: My first two hives of 10,000 have been ordered :)
Do you have enough drawn comb to make 8 splits? The comb drawing season is just about over and I suspect you don't have 40 drawn frames laying around. Keep the feed flowing heavy and you might get a few more by August but I wouldn't bet the farm on it.
I'll be making splits in a few weeks too, but I will be breaking down double deeps to get frames. I am throwing everything I have at them now trying to get that one or two extra frames drawn out.
Thankfully, the bees are smarter than I am. They are doing well, in spite of my efforts to help them.