typo, it will be 1/8", already have it rolled, and the pipe going thru it should stiffen it, keep it from collapsing. Hey, I'm making this up as I go! No rental yards here with crane buckets or anything else that'd work.
I do have to admit, though I have hauled a lot of concrete in 5 gallon buckets, and not that long ago, I was still surprised to see it weighs that much more then water. I would have guessed double, I think any shortcomings in the design can be solved by light enough loads 1/3 of a drum, 1/2 at most, beta testing will tell the story.
Hold on...a major math/ reading comprehension error: One cubic foot of water contains 7.48052 gallons. The weight of one cubic foot of water is 7.48052 gallons times 8.3453 pounds, which equals 62. I misread this earlier, and no one here caught it! So, concrete all in all, weighs around 2.4 times as much as water, the first way I stated it, it would weigh 17 times as much! That what I intuitively knew was off, and what I get for just googling the info, then mis reading it, instead of penciling it out myself. Garbage in and out.