I'm not following your math... I think you need to spend closer to half a month per year on that diet, not 6 days.

I think I mixed up alternate descriptions of a slightly extended weekend every other month and a little over a day a month.

Doesn't seem like you can (easily) buy a 25th of one of the kits, so replacing it gradually still doesn't seem like a very practical solution.

Seems a good opportunity for a startup, if they can solve the problem of how to deliver the stuff without knowing the delivery address (if you are into this, you don’t want anybody to know where your food is)

Such a startup could also offer to take in that 25 year old 1/25th part to give it to a food bank, making the purchase deductible as a gift to charity.

Unfortunately, customers only need to start replacing stuff after years (you may want to replace 1/25th a year on average, but do you really want to start doing that a year after buying this?)

> Doesn't seem like you can (easily) buy a 25th of one of the kits

There are similar long-shelf-life food products on the market that aren't kits of the same size; it's true that Costco doesn't sell exact 1/25 increments of the kits (but they do sell a 30-day supply, 30-year-shelf-life kit from the same maker as one of the one-year kits, which lets you do the same rate of replacement with a purchase every two years.)

Gradual replacement is eminently practical.

From the ad copy, the kits appear to be put together from Thrive products: https://www.thrivelife.com. You don't have to buy it $6000 at a pop. Buy a box of dried beans if that's all you want. I've purchased their stuff in the past, not bad for freeze-dried.