Just finished reading alas Babylon have a few questions RE food

[TOF]

From the top, no, you can't salt down offal and sausages. Best way of preservation of these is to make pate or similar with the offal and preserve the sausages as you would Rillettes. However, both these methods are short term. Before the freezer, when an animal was slaughtered, the offal was generally eaten first, because it's so difficult to preserve and it goes off quickly.
Consider dehydrating the veg and fruit. Although you can salt fresh veg and use fermentation method too. like these.

http://www.1900s.org.uk/1900s-preserving-beans.htm

http://www.wildfermentation.com/vegetabl...plified-2/

I have moved away from relying on freezing as a preservation method, for that very reason, you could lose an awful lot of your stores with a power cut.
It doesn't matter that you can't rotate out quickly, as long as you do rotate, you can have a large stock of an item.
Some things can take me up to 2 years to rotate out, others a few weeks. Try not to rely on one particular type of food storage.