If you were to replace electric heating with gas/wood, and electric cooking with gas (or wood), your daily kWh (of electrical demand) would plummet. Any electrical heating element is a killer for off-grid use.
Is air-conditioning part of the consideration? Are you planning to live somewhere that you might do without it? Is your off-grid house going to have some passive cooling designs?
If you want to go off-grid, you've *got* to change your outlook. In order to avoid spending more money on PV, batteries, and backup generator fuel, your whole approach to energy use must change. Do an energy aufit of your current usage, and decide how much of that could be made more efficient, e.g. LED to replace incandescent lighting.
FWIW, my house of 2 adults and 2 teenagers used ~9kWh daily when I last did an audit. No aircon, no electric heating or cooking, all wood and gas. All but one of us use a laptop instead of energy-hungry desktops, and we don't do without anything else, except blackouts.