Most major appliances list their yearly wattage in Kw per year. The highest efficiency fridge sears sells is around 330Kw. If you can get a fridge that is around 1Kw per day your doing great!
As for the Hot Tub, yep. The 220 is to HEAT the Water. I think it has two different circuits. The pumps are probably running on 120. The only way to heat water is passive solar. You could run your hot water heater off of solar off of PV but it would cost more than it's worth. Passive is cheaper and you get twice the efficiency vs PV.
Yep, the balancing act is the greatest hurdle on the top loader freezer fridge. Because, as soon as the food at the top wants to be in the low 30's, all the cold is still freezing in the bottom and you can't just move around that cold. So you get a big chunk of solid ice all the time in the bottom half of the fridge. I was just thinking if you had computer fans that cycled to circulate the cold from the bottom, maybe you could possible maintain the temps. The only other way I've heard is people putting gallon jugs of water at the bottom. They say it kinda regulates the temps and you don't have to turn on the compressor all that much since well, it's kinda like putting bricks in an oven. The bricks maintain the EVEN heat so that your not having a big jump when the coils in the oven turn on. Don't wanna burn the Pizza!
I'll probably end up just buying a 500 dollar fridge that has an ice maker in it that get's around less then 350Kw's a year. I'd like to try the DIY .01 Freezer/fridge out some day but when I get it down to how I want to use it, then maybe I'd trade it in, but not having an ice maker is kind of a deal breaker for me.