My sister has a bungalow in her backyard that I am considering moving into. I'm going to kind of larp living /out/doors seeing that it has no utilities and basically is just a box room. (But I will have access to the main house for stuff)

What essentials do you think I would need for it if I had running electricity too.

Is it worthwhile having a portable stove or is it pointless since I have no sink/water access? Or should I just keep it limited to coffee brewing?

Also what should I do in terms of water storage so I have access to drinking water without having to go back to the house to often.

Mind you, I have never moved out of my parents home despite being in my mid 30s so I don't really know what I'm supposed to have