I have the smaller version of this mixer, it is designed for 40# bags; however, I have used it to mix over 200 60# bags with no trouble. Beaware there is "some assembly required" (morelike a LOT of assembly required).
I live 13 miles from the HF store in Woodland Hills CA and when I was there last week I saw that mixer and was impressed with how good it looked for the price. Grab it before it goes back up to $270........they have a 3 1/2 cubic mixer for $168.00....
You can be derisive but remember this is not a contractors forum it is a DIY forum. Twenty years from now the kids and family are going to look back and think with pride that "Dad did that"....... however you're challenging quality im-n-s-h-fo :laughing: