I moved my 4 post on my trailer 227 miles, installed it myself (when I was in my lates 60's) and would do again. You'll never sell it anywhere near the cost to replace it today.
Two years ago 9100sq ft cost me $30k in the middle of NH. They added two truckloads of base to what I already had, rolled it out on day one and paved on day two.
Are you sure getting inside the property line is enough? Can't speak about TN, but everyplace I ever lived there was always a setback within the property line before you could build. Also, are you on good terms with your neighbor? If my neighbor came to me with an issue like this I would...
I have a standing seam metal roof on my RV garage/workshop with a 7/12 pitch. Pretty good snow fall (middle of NH) and it always slides off once the sun comes out. I don't think I would do anything less.
I don't know if they still have the same quality, but I've had a Bend Pak BP1 (14k, extra wide and long) for 25 years with zero issues. I think I paid around $2500 delivered in 2001 so I consider that money well spent, especially now that I'm old.
I have a 67 mustang and was planning on welding subframe connectors from the front to rear subframes. I jacked up the car around 18" and stacked blocks under the tires. I lowered the jack and everything was secured, but I noticed the tires were not centered on the blocks. That really didn't...
I purchased three Liftmaster LJ8900W for my RV garage (one 12x14 door and two 10x10 doors) and have been happy with the purchase. Best price I found was here:
https://shopactiondirect.com/product/liftmaster-lj8900w-light-duty-commercial-jackshaft-operator/