Hi Peri,
So exciting, to be buying land!
About getting electricity from water, I've looked into it, and I haven't run into much that's feasible for getting power from a horizontally running river, even if it is fast, powerful, and plenty of volume. It seems all practical hydro- power, needs a "head," ie a vertical fall. Our school is on the bank of the Indus River but on a plateau about 80 feet above the river. It's a good flow, a bit scary to swim across, but in these 20-odd years we haven't found a practical way to harness that energy without head. I am still hoping that we will still find a fruitful way to do that.
We use solar electricity, because this region is one of the best places on earth for solar. We use it for pumping and all the electricity for our school, where about 50 - 100 are living most of the time. That's over a hundred LED lights most nights (each 2W), a dozen or two mobile phones (each under 10W and only a couple of hours), one TV (under 100W, and we don't use it every day or for many hours at a time), 10 - 20 laptops (each 50W while charging or being used). No heating or cooking appliances. When we need to use power tools, washing machine, or kitchen mixers, which are counted in kW not W, we try to make sure to use those before or during midday on a sunny day, to make sure the batteries charge up again before evening for lights. This past year it seemed the main reason we used the generator was for the skate sharpener, (which you as a Canadian would understand is essential and cannot be compromised on!

-- I am not Canadian, I am a bemused bystander).
Asking how much electricity is needed for an average house is like asking "How long is a piece of string." You should make a list of all your power usages: The item, the wattage it draws when on, and how many hours per day it is on. Multiply those together to get your Watt-hours (Wh) per day, and then divide by 24 to see how many Watts you need to use, averaged out. A few high-wattage items will jump out as using more power than all the rest, because they produce heat, and you'll have to think if you can eliminate those. I would hazard a guess that almost nobody who generates their own renewable energy for their home uses a clothes dryer, hair dryer, electric stove or oven.
If I go back to living on the grid, my first purchase will be a toaster!