I am looking at propane - because it does not go bad, ever, and I can run several systems off of it. It is one option we are kicking around.
We have a zombie stove already, a wood stove we use to heat our home, and can also cook on.
But we have a lot a lot of meat in our deep freezer, so it is a big deal not to let that spoil. We live out here, so we loose power pretty often. The system I am looking at is more for on and offs, a couple weeks at a time, not as a zombie solution. For JUST the freezer we have a gas generator, everything else we have other plans
Solar is nice as a way of living, as a back up system- I can not see that working out dollars and cents wise. If you just want one as a back up you have to ask the right questions - you want to look for used panels if you are handy at putting together your own systems, you can build solar systems for so much cheaper if you are creative in looking for the materials- but its a way of thinking if you are using solar as your energy
I am also looking into getting my water source not on an electric well pump. Gravity fed water is a nice option, and I really really love hand pump wells, its on the wish list. (My livestock goes through over 60 gals of water a day min- so a day without power on my well pump is a biggy(I store a lot of water) but water not relying on electric is a big deal
for the sump pump... what about a manual sump pump?