bluGill

Trees with rebar in them are cut all the time. Loggers are trained to examine the trees for signs before cutting into it - your rebar will leave visible scars for years, and the logger will see those signs and cut in a different area to avoid it.

I am a trained logger - I volunteer with a local youth camp clearing dead trees.

18650 batteries are easy to source and cheap. You need a battery welder (either expensive or lively to burn out in one use - there seems to be no middle ground) chargers are also available. The hard problem is everything is marketd at electrical engineers who understand details of how to put circuits together. There are no trustworthy sources of do this or but this kit (at least not that I have found)

beware that mistakes will burn your house down and insurance won’t cover it. That risk is why even though this should be easy I have not done it.

Second this. I was at camp (with my kids) this summer and able to keep my phone charged just by leaving my power bank charging at the tent while I was hiking. No more trying to find a free outlet in the dining hall, just recharge while sleeping. My power bank would have made maybe 3 days, but I was able to be gone for the whole week.

We got green bonus points at the camp inspections because I had that outside my tent as well.

Large parts of the corn palt are prarie and should be grass as far as eye can see. Corn is a grass.

Nothing significant. Hydro works on the principal of massive quantities of water are cheap. Massive quantities will always need a lot of space.