Katherine, Lantana is my most productive butterfly attractant. Zinnia has been popular in my yard this year. For height, mexican sunflower seem to be a hit for butterfly's and I'm pretty sure I seen a couple humming birds checking them out a few days ago. Butterfly weed also. Hopefully some of these will grow in your zone.
The day Paul posted this thread, he posted several others. They all were ideas or projects he would like to see being done right now on his farm. Your ideas and pictures would fit better in the thread I posted above. Or you could always start a new thread in the round wood and timber framing forum. I personal would love to see your work posted over there.
I think Paul was just making a statement. Sort of like; I have the tools, I have the wood, I need someone building furniture! . He had requested a roundwood furniture thread awhile back, you can take a look or post pictures and ideals over there. https://permies.com/t/25503/timber/Roundwood-Log-Furniture.
That's cool. Do you have to fill it manually? I've never seen one without water pressure, so I haven't the slightest idea. Will it cycle with just a gravity bucket above the washer? Really cool I bet your happy!
At a master gardener symposium a couple years ago, one of the members asked "How can I save the bare root plants that come from the Arbor Day foundation or mail order magazines?". This caught my attention because I've lost plenty of bare root plants. The answer was, "Put them in a wheelbarrow for the first year with excelent soil. Then you forced to pamper them a little and you'll also be able to control thier environment much easier. The next spring, you can plant them out with a nice set of roots and a little soil. I totally agree with plants being much stronger from seed , but I'm also guilty of ordering a few bare root plants in early spring each year.
I found that to much agitation, or maybe to aggressive agitation actually killed off beneficial microbes. In my case an air stone clogged and was producing large bubbles near the end of the stone where the tube enters, it killed all the nematodes I was trying to save. It can't hurt to try what you described, we love experiments at permies (especially if they include pictures).
The charge controller on the solar cart has a load diversion built in (I think). When the batteries are full, this feature allows the solar panels to be utilized instead of just sitting there casting shade.