Bananas are one of the most productive, useful & easy to grow SHTF plants in the sub tropics.
This lot would weigh an easy 13-15kg & took very little effort on my part. All I really did was get up a ladder & bag the hand about 4-5 months ago (to protect from fruit bats). No fertilizer or watering. I'll occasionally go through and remove dead leaves & excess suckers/pups from the clump.
Once the stem has fruited, it dies making way for the next stem. I chop it down when harvesting & use it as a high water mulch.
Some of the green bananas that broke off were peeled & fried in tallow. They taste very similar to a potatos when cooked like this.
The only problem is trying to get through that many bananas (they all tend to ripen at once).