FrederikSchack

Sorry for taking this a bit off topic. I think it´s not only SA or Escam that is degenerating, it´s all of the world and the more centralized it gets, the more degenerate it gets.
Just look at the top posts. WHO has a former top communist geurilla and human rights/information suppressor (Tedros), BIS has a mexican control freak (Castens), WEF has a fascist(Schwab) and now they are cronying up togehter. We have a nerd (Bill) who has way more influence on vaccines and conflicting interests, than those who actually know something about vaccines. 
But that´s a rabbit hole.

Hi Frederik,
it looks like you have done quite a bit of good research. I was in the same situation 2 years ago. I first opted for 9 panels (3S3P) with a total of max 3kW, 9.8kWh (200Ah) Li Fe Ph battery, and a 5kW hybrid inverter. My considerations are first: the life time of such battery goes trough as much as 3 AGM lives. It also eliminates the aggressive acid vapor from the lead battery.
Second: studies show that the more you tilt the panels the shorter is optimal exposure. Flater panel installation yields longer daily power. I got mine flat on the roof of approx 26°, we are about 34° south. Good panels accept quit some sun angle. Mine delivered up to 3.3kW in the afternoon, that is 10% more than specification despite the far from optimal exposure. My concern for you is the hail. Good panels are quit sturdy but I don't know if they would stand such hail. Perhaps you should install a protective glass over them, perhaps acrylic glass. 
In the mean time I have upgraded with 3 more panels, an additional inverter in parallel (electric cooking) and another 100Ah battery pack. We suffer from frequent scheduled load shedding of up to 2.5 hours up to 3 times a day. And I am afraid that it is going to the worse.
The consumption you indicate seams correct. But consider that it depends on the number of persons in the household. Also think of thermal heating panels for the water heater. The simplest would be to find a place for the panels lover than the heater. If the panels are higher than the heater it would require a pump with a control system.
Good luck!