kgdlg: you're right: shipping containers are not comfortable in weather extremes. we use them from time to time in construction to store stuff. they sweat in damp weather, causing a lot of moisture inside. they're not insulated. they are extremely hot in the summer.
not to say it's not doable. they can be insulated and have vents cut into them. there are insulated and refrigerated units that can be modified for 110-volt power and actually have water hookups.
but it's an expense for materials and labor, and modifying shipping containers requires expensive materials and things like cutting torches and people qualified to use them.
i've had the same thoughts, though. the port and its many contractors are sitting on what seems like hundreds of thousands of those things scattered around the duwamish waterway.
if there's sufficient land, the containers could be spaced to provide covered and uncovered outdoor space. they can be arranged to provide a natural security perimeter. they're strong enough to support things like solar panels or small gardens. they're modular and stackable. and they're eminently portable, given a truck and a roll-on trailer.
ideas, ideas everywhere. but is anyone with the power to make things happen listening?