It’s so exciting, isn’t it? It’s almost thát time of the year again. :0)
I remember setting up such a greenhouse last year - lol - it took us some to figure it out too.

I’m really curious what you mean with cutting the barrels in half and turn them into a garden. For some reason, I can’t assemble a picture of it in my mind.
Be sure to take some pics!
Could make a great entry for my new challenge ;0)