Unfortunately, at those prices, the return would have to be considerable to justify the initial outlay of $50,000 and the £3,000 (in Britain) electricity costs! What crop would pay that return and a profit as well? Oh, yes, cannabis.
Seriously, if you rented, then that's £671 rent per month, and £250 electricity costs (per month!). Add on £2,079 per month profit required and you have a monthly cost of £3,000. Seriously, what crop will pay that? You would have to find one that would pay £1 per plant - to the farmer!

Thre must be more money in salad than I suspected - $1000 per month per container plus 2,500kwh of electricity plus the cost of water and nutrient is a LOT of overhead to be earned back with some leafy veg ... and we are not even talking profit here ...

@LikelyLad - I'm not sure what the growth capacity of the units are so it's hard to say what the income would be. I have watched hydroponics for some time. In a discussion on vertical farms they were discussing the viability of converting an unused building into a vertical farm and discussed $6/head of high end lettuce in New York NY. The farmer sells directly to the restaurants that use the lettuce, not to the normal distribution network that involves five layers of markups before the consumer see the produce. So to break even with your numbers the farm would only need to produce 750 heads or so. If the restaurant were to lease the unit and grow their own they could save significantly over that $6/head figure. So while challenging it is not an impossible target for an urban farm, but probably useless for a rural farmer.

Great Idea, especially in Remote Regions. Like the Above and on the Arctic Circle and Antarctic Research Stations...

Just KEEP ANIMALS OUT of the plan. I don't want to hear of thousands of chickens being crammed into one of those.

reminds me of clandestine labs that were mobile for growing weed. how interesting they are now mainstream.

Why wouldn't somebody just copy this whole thing and build it themselves? By the way, a shipping container gets pretty warm inside if out in the direct sun.

VirtualGathis: I love the idea, it's just that it appears to me that the economics make little sense. I could see it working with a high-yield fruit, like strawberries, and Cropbox are due to produce just such a unit. But, like you say, more suited to restaurants (maybe) or something like Gourmet Garlic, where the yield price is high.
Here in Britain, we are seeing many farms being converted from crops to solar farms. We have 65 million people here, and land space is limited (though you wouldn't think so, given our immigration policy!). Maybe vertical farming is the way.

Even regular trucks, (lorries) have translucent roofs to help with the lighting why not here to aid in growth instead of just LED's?
BTW who & how is the water, power handled? These aren't autonomous, since someone has to harvest the proceeds.

Don't forget labor costs. The plants and all that equipment aren't going to tend themselves. Even if the owner did all the work by themselves, they still need to pay themselves.
Certainly there will also be various building codes, land use permits, and other sundry taxes and fees to consider. Transporting the produce to market or the restaurants also needs to be accounted for.
It is possible to buy greenhouses with the same capacity for much less. The hydroponic gear would still cost a pretty penny, unless one went with raised beds or the like. LEDs wouldn't be strictly necessary either, though they could be installed for use on cloudy days and could get run to extent the growing time after dark, but that would still cost less than running them all the time.