You don't even need to be in a big empty country like that...Even here in Germany there are plenty of depressed rural areas especially in the east.

As long as it doesn't have convenient access to the rail network or an autobahn you can find a plot with a small, old house on it even 2-3 hours drive from Berlin for next to nothing in a village that had 2x today's population in 1990 (and everyone left there today are old people).

EDIT: example via quick googling of the least-densely populated districts in Germany: https://en.wikipedia.org/wiki/Prignitz

It has fewer people living in it today than it had in 1875 (earliest available data) & half as much as it had in its peak in 1950. It is about 2 hours drive from Berlin according to google maps.

This is simply not true, certainly not for the example. See https://www.immowelt.de/liste/pegnitz/haeuser/kaufen?lat=49.... for listings of Pignitz. Standard (although well sized) row houses go from 250.000. Pieces of land where you can build go for 200k per acre (https://www.immowelt.de/liste/pegnitz/grundstuecke/kaufen?la...)

You are looking at the wrong place (Pegnitz is a suburb of Bayreuth in Bavaria, Prignitz is a rural district in Brandenburg).

Looking at houses for sale in the state of Brandenburg with price limit of €10k gives several results (some of them probably dubious but not all): https://www.immobilienscout24.de/Suche/de/brandenburg/haus-k...

It will not be a comfy home for a family but for the type of stuff discussed above it would do (e.g. a formerly abandoned but still standing/stable house).

In Canada though you're gonna be 1) very VERY remote, and 2) you're gonna be extremely cold. It's no surprise that the most expensive cities in Canada are also the furthest south.