M/B, for raised beds we used some cattle "lick tubs" and some plastic barrels cut in half. I got them for free at the recycle location.
I use something similar. They are like a stock tank without a bottom. About 3 feet wide and 6 feet long. I use 20 gallon grow bags and plenty of 5 gallon buckets. They do surprisingly well and you can get several seasons out of the grow bags.
I'm going to try and get 3 more of the bottomless tanks in the spring. They make weeding and watering way easier.
