If you read the links there are suggestions to "retrofit" office buildings with what you are suggesting - more than fuel what the system saves is water as the runoff from one level of trellised plants flows down into the next.
One thing - I'm presuming you are planning to have this community well away from any nukes as surely the windows would be blown out by the pressure wave? Reclaiming glass and refitting windows twenty storeys up doesn't sound like a job I'd fancy, myself.
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