There is no specific answer available on your question, but if this helps consider,,,,
2 12 volt batteries likely 85 Amp hr each so 170 total.
You shouldnt let batteries go below 50% charge so 85 available.
2.5 amp hr use for fridge,
So possible 34 hrs use for fridge alone,,,, but
You then mention the additional uses of boom box, phone chargers, I assume lights, water pump, TV and the booster, and all the small phantom loads.
So you make the call as to how much to shorten your time from the 34 hrs, nobody else can really tell you, but yeah, after day 1 you will have to run the genny a few hours a day at best.