A couple of things from the older posts:
1. Your homesite looks great.
Personally, my only worry in buying something like that sight unseen would be if it had a good water supply. Good luck and have fun.
2. When you used the online battery sizing calculator, you left the second column (which is daily use) at zero for the heavier loads. If you look at the "Total Daily WattHours required" box, its total of 820 is just for the computer and misc loads. The first column is instantaneous loads, and is useful for inverter sizing. The second column is for accumulated usage, and is the basis for the battery bank sizing.
Since you have a Kill-a-Watt, let it accumulate the usage on each appliance for 24 or more hours, and in the second column enter the accumulated watt-hours adjusted to 24 hours (two-thirds of a 36 hour total, one-half of 48 hours, etc). This will come up with a somewhat larger battery requirement.
3. If the photovoltaic panel label in the next photo is the panel you got, notice that it only makes 90 watts at 17 volts!
(Max power 17 volts x 5.29 amps = 89.93 watts in 'standard' sunlight) If you have a Maximum Power Point Tracking (MPPT) charge controller, you can get close to the 90 watts, with the panel running at around 17 volts and its output being down-converted to 12 volts for the battery. If you use a simple 'disconnect when full' overcharge prevention limiter, you will get much less power.
Look at the 5.77 amp Isc short circuit current and the 21.5 volt Voc open circuit voltage. The power curve for a panel generally looks like a horizontal line at 5.77 amps starting at zero volts up through maybe 15 volts, then falls off to zero amps as it curves down to 21.5 volts. The maximum output point is on that curve between the maximum current and maximum voltage points.
Connected directly across a battery with no controller, or a shut-off only controller, the panel is loaded down, and you will get:
5.77 A x 10 V = 57.70 watts into a discharged battery
5.77 A x 12 V = 69.24 watts into a half-discharged battery
5.77 A x 14 V = 80.78 watts into a full battery
So, without MPPT, the more you need a recharge, the less you will get. (I have two sites with older disconnect only control, and the result has been disappointing.)
There are charts that estimate average sunlight hours per day adjusted to 'standard sunlight' for different areas. Around here it's about 4.5 hours in winter. So I could estimate that with MPPT your single panel would give me 90 x 4.5, or 405 watt-hours per day. There's obviously more light in the southwest. It looks like the one panel won't make you generator-independent, but will cut a big chunk out of the requirement.