the "$50 and up Underground Housing Book"

Try the "$50.00 and up underground housing book". A very informative read.
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$50 and Up Underground House Book – Underground Housing and Shelter

 

Re: housing book

i'd love to get my hands on that, or even a pdf copy

i think a well planned underground shelter
is the next best thing to a simple cave

always on the lookout for natural/abandoned structures
that could be used in a pinch or converted for long-term use