When I first decided on the floor being concrete, I figured I'd just do it by bags and a mixer. But after a few folks comments on getting it delivered, I looked into that. It turns out, after all expenses of mixer rental, bag delivery, the cost was only about $14 less to do it all by hand. Naturally, I went with the concrete mini mix delivery to save my back.
I was able to get it scheduled just before having to take some time off to entertain out of towners so the timing was perfect. It literally only took 10 minutes to get it poured and fortunately my neighbor happened to being around and helped me scree it, and even did the first smooth float.