The concrete pad I poured last week dried, and I got the rain barrel back up. Only one layer of cement blocks now!
And another view:
(I am going to turn the cement blocks the other way so it looks better from the front.)
That is one down, 2 to go as far as pouring pads. I still have this barrel and one other to paint. I'll probably go with a faux terra cotta color to match the barrels that do not need painting.