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This is what the US have encouraged Taiwan to do. Taiwan wanted to purchase a few incredibly expensive fighters and ship from the USA, but basically all war simulations just had China target these and secure a fast win. The USA instead encourage Taiwan to take the “porcupine” technique, spreading many small weapons, particularly handheld anti-aircraft type weaponry across the country. The plan is to make invasion too inconvenient. The flip side is that without a reliable way to show a display of strength, anywhere the larger aggressor does pick on (USA to UK China to Taiwan) can focus on one part of the country and reliably cause massive damage there.
A few years ago in my home town (UK), some people were arrested for making cocaine in their bathroom, by recreating the climate of south America in their bathroom.
It would be wildly impractical and very silly, but also a great experiment, to set up a coffee plant in your home, simulating the humidity, temperature, light and air pressure of high-altitude rainforests, just to have your own sustainable coffee.
If locally sourced and sustainable are your goal, there are some amazing mushroom coffee alternatives that do taste like coffee, one of my local coffee shops offers it. But I also understand the tempting voice in our heads that makes us want to do it the hard way, and get the correct product from a 100% self sustained route.