I have seen plenty of train sized boxcars used as actual housing. In fact, you can order one from Amazon though I don’t think it will be “Prime eligible”!
Even so, a trend in cities to convert old warehouse buildings into close-to-the-restaurant farms via hydroponics and LED lighting is making progress. It looks like someone decided to use a boxcar for their own, solar-powered homestead version of a vertical farm. Take a look at this link:
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