Utah it looks like we are thinking the same
I have an old insert from a half barrel that I plan on putting in the GH as well. In looking at the photo of your GH I notice that you are using the same type of oil heater that I have. Does it keep the GH warm enough on these cold night? I also bought a Mister Heater (propane) for backup. My luck the power will go out and I'll loose all my orchids what a horrible thought.
Its gonna be fun decorating it sorta
I want to try my hand at growing some in baskets like you have.
Sherry