Thanks, guys! I do enjoy it, and even though it is physical work, driving that tractor has given me a lot of time to get rid of mental stress. So, no, the Kubota isn't ever going to be structure...well, not on purpose, anyway.
I was digging right up until we got the Spring rains, and if I had known to do so, I'd have placed structure while it was still dry. When I placed the aforementioned structure, I had my dad on the tractor, and he pulled it into the middle with a cable as I guided it into place. It's all around 5-6 foot deep, that sound right?