Hi Baba! Along with Karen, my answer too! You've got at least two of us right standing right by your side :) P.S. Mine isn't for business. Mine is about calling my mom and dad, sister and Don! Big smiles :)
I could live without any of your examples. Electric lights...that's the thing I would really hate not to have. I hate dark. The thing on your picture most necessary is communication with the outside world, and the best and most reliable way to do that is with a landline.