I have speculated that, someday when I retire, I might purchase a property with no home on it. This is the reason I'm now doing my homework here.
Rather than "waste" money on a trailer home while a proper "passive solar" house is built, I have contemplated various temporary housing options that will still be useful later for storage or a shop.
I have seen two of the steel shipping containers (8 feet wide, 10 tall, 40 long) set parallel with an elevated shade roof over both. The area in-between formed a shaded patio of sorts. The elevated roof shaded the walls and tops of the containers, so even on a hot day, the interior temps were mild.
A glance at your figures shows that a federal employee specified the details. An evacuee yard will most likely be set up in the nearest vacant field, and immediately supplied with electricity by mobile Diesel generators (later changed to propane?). Trailers of some description will be brought in to form a temporary community. Port-a-johns can be set up, a 5,000 gallon water truck can be parked, and a satellite dish with a portable cell tower set up. Laundry can be done in a "laundromat" trailer.
Then, people will "want" certain things, but sometimes teenagers and evacuees shouldn't be given everything they ask for.
To heat up the inside of a trailer in hot weather with a 3500 Watt electric stove, and then to cool it with air conditioning is,...well...the type of thing the US government would do. This is not a good idea, and it eliminates the possibility that renewable energy might be used. The electrical loads are way too much, and the size of battery needed (cloudy day, no wind) is very large. Evacuees cannot be expected to properly care for a large expensive battery pack.
Trailers should be provided with an OUTDOOR propane barbeque under the patio shade (no carbon monoxide build up). The insides should be provided with cross-flow windows and ceiling fans. No AC, an elevated roof can be deployed to shade the top and the sunny side. Refrigerators should be chest style. If the weathers too rainy to cook outside, eat sandwiches (I do) or stew from a low-watt crock pot/e-skillet/microwave. Use low-flow showers with a small propane water-heater tank and solar water pre-heater. (Don't like the set-up? we can help you get a job in a state where there's work, and then you can pick your own apartment)
If you want to put solar PV panels on the roof and a telescoping windmill, great, they will charge a battery pack. An inverter will alow the battery to power some lights and TV at night.
For the amount of money FEMA has spent on each family to rent a hotel room for 9 months, they could have given them a car, a motor home, and a piece of property where there are jobs nearby. The trailers FEMA built had brand new carpet that strongly smelled of formaldehyde, making some people sick (why did they need carpeting?).
There are lots of retired snowbirds here now in Southern Utah (from Montana, Idaho, etc). They live in small motor homes or fifth wheel trailers. They cook with propane and have propane back-up generators. Their electrical loads and battery packs are small. They seem to be much happier than the evacuees I've seen in on TV.
The scariest words in the english language are "I'm from the government, and I'm here to help you" -Ronald Reagan