Water.
Hydration for our bodies, our livestock. Fluid to clean gardening clothes and cast iron dishes and sweaty, dirt-smeared skin. Liquid to hose down sprouts and clean off udders.
Without water there will be no homestead. Without water there will be nothing to farm and no one to farm it.
Out on our land we are off the city grid for sewage, water and trash removal. By taking building into our own hands we've cut out the middle man that would arrange a well to be dug for us. Even hiring a well-digging company is out just because of the ridiculous expense. This puts establishing a working, economical, safe water system in our hands.
We will at some phase be hand-hammering a sand point well and attaching to that a manual pump. This water should be clean and clear enough to drink without a heavy filtration system But given the drought prone area we live, we can't rely soley on a well dependant on top-soil run off. According to our watershed management department, we're allowed to harvest as much rainwater as we want without needing any permits or inspections.
This is largely Rob's project and he requested I get this book for him The New Create an Oasis with Greywater: Choosing, Building and Using Greywater Systems - Includes Branched Drains