Can you build a cold room? Do you install solar electricity?

These 2 categories of engineers should put heads together under this tweet to come up with a cost of building a low cost solar cold room that can be replicated nationwide.
They can be built to incorporate both refrigeration (for vegetables and other fresh foods), and freezing.

What will it cost to build a 10 ton cold room with refrigeration capacity? (approximately 3kw)

What will it cost to power it with solar electricity?

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