A typical 10kW solar house system costs around $35,000-$45,000. That does not include maintenance or replacement of damaged panels. You may be able to get a grand from your province or utility company for a small percentage of the costs. This considers of 40 or so 250W solar panels at just under 1.5 square meters each, costs of a DC to AC converter, wiring, and installation. That is around 600 square feet. What you can actually place on the roof depends upon the construction of the roof, weight allowance, snow loads (which can be high in Saskatchewan), etc.
You can't run a home solely on solar. Panels only produce power when it is sunny outside. It produces no power during the night, cloudy days, snow, rain, etc. Such system do not include any type of battery storage -- meaning you only get power during the day. At night, in the winter, on overcast days, etc. you have to get power from the grid. The only way to avoid this would be a battery system -- which will cost several times the cost of the solar system, needs to be replaced every few years, and takes up a lot of space. There is no way that batteries can store enough power to last through the winter months -- when the panels will produce little or no power (sun too low in sky and too much snow).
Further, 10kW is its peak production. This assumes the angle of the sun is directly overhead. As the sun moves across the sky or its angle across the horizon changes -- production is a lot lower. This is particularly true in higher latitudes. It typically also means that on sloped roves, only one side can effectively have panels.
Finally, even a 10kW system is not that much. It is about the typical usage of a house, but most people use power at night. It would power your hot water heater, some fans, fridge, etc. with maybe 50% to spare. Again, none of this power comes at night or in the winter months -- typically when people use power.
If you wanted to run a home in Saskatchewan solely on solar power... you need some way of producing far more power during the summer months and storing it during the low-sunlight months and the winter (when you are likely producing no power). This would mean you would need a system four or five times more than this ($150K+), a large open yard to place the panels, and a battery system able to store three months of power (likely 20,000 kWh). At current battery prices that is going to cost $2M+.
The issue is storage. Batteries run $500 for a kWh. That means a typical nights power needs about $20,000 worth of batteries to store up. 90 days and nights... millions.
Most home solar systems produce power during the day during non-winter months when folks aren't home and generally using power... and sell excess power back to their utility companies. A typical 10kW system can produce around $5,000-$6,000 a year depending upon your day-time power usage, utility company and going rates. This helps offset the cost of power purchased during the winter months.