Wow, it's like I just witnessed an adoption first hand! I feel so excited for both of you. I went 2.5 hours to buy my koi from a breeder that I met through this forum. He told me to get a couple of battery operated aerators from the bait department in Wal-Mart, and bring a large cooler. (None of the 7 koi that I bought were as large as your smallest one, though.) I had no idea those battery operated aerators even existed. And, now I also realize that I can use them for aeration in my indoor aquariums in the winter time if the storms blow out the electricity for an extended period of time as well. Never thought about that!
Sounds like KoiDaddy has all bases covered, I learned alot through this thread, too!
Good luck to both of you, and we are all going to want to see pics of the two owners (old and new) before you part ways! And, as I've learned and I'm sure all you pros already know, please take pics before you put them in your Q-tank, KoiDaddy, so we (and CalicoChris) can see what they each look like. How lucky you are, KoiDaddy! Happy ending soon!