Michael commented on a previous post:
Plan A stay home. Always have a realistic Plan B and maybe a Plan C.
In
general, never be a refugee. You're an unwelcome person looking for
human kindness and generosity to survive a bad situation.
My plan
B is shared by many of my trusted friends as they also have the same
plan B. We pre-positioned supplies in each other's homes, so we'd be
welcomed visitors there.
I've a "Storage Shed" both here and at a
friend that is well insulated, windows and in general easy to make a
sturdy shelter if needed.
Trusted friends and trusted family along with a strong faith in God is better than "money in the Bank" and even gold in hand.
There is very little I can add to this.
How much space?
Excavations of Capernaum, the city where disciples removed a roof panel of a building to lower a paralytic into the room where Jesus was preaching) show large rooms of approximately 400 square feet and small rooms of 100 square feet. The most typical construction was three sides of masonry and one side (possibly) wattle or mats or light-weight wood. Typical spans were between 8' and 12'. Toileting and cooking areas were likely to be communal and not under-roof. Two adults and two children in 100 square-feet is less than one sheet of plywood-per-person of housing space.
Mrs ERJ recently shared that there was a homeless family of at least two adults and one baby sleeping in the back of a full-sized pickup with a "topper". No cooking or toileting was done in the truck. That is basically three people per sheet-of-plywood. In Michigan. In November.
The city of Vienna, Austria* requires 9 square-meters (three sheets of plywood floor-area) per adult and 6 square-meters (two sheets of plywood) per child under the age of 7. I believe that includes the space used for toileting and food-prep.
In the winter, shrinking the foot-print per person to extremes (like the truck cap) results in issues with condensation and loss of insulation capability of clothing.
If you round the Vienna number up to 100 square-feet then the standard, US, two-vehicle garage can hold 5.7 adults or 2 adults and 6 kids.
Extreme sanitation must be exercised at toileting and food-prep areas. Bringing new people in can be a train-wreck of ectoparasites like lice, bedbugs, fleas and so on. A supply of "bug-bombs" can be useful in such situations.
* Hat-tip to reader Simon