G'day,
Your best bet for water is to install a water butt. I've installed two and in this country, you are unlikely to ever run out

. Some puri tabs or boil it for drinking and you are independent and off the water grid (I've connected one to my toilet cistern and almost halved my water bill). As far as hygiene goes, get a solar camping shower, they only cost a couple of quid and work pretty well.
Self defense is trickier, but I've found an axe handle is a good start

... work your way up from there.