Ooh, as an American involved lightly in real estate who relocated to Suomi a few years ago I always love this topic. Let me ramble.
It's worth pointing out that, on a country-wide level, Finnish housing prices have been remarkably stagnant for the last 20-30 years when compared to e.g. the United States or most other European countries. That is not true of the cities, obviously, and cities are where all the work is, but it is quite possible here to find very cheap housing in the "middle of nowhere".
Government subsidies don't change that dramatically between these different areas, so it's entirely possible to rent e.g. a studio apartment someplace like Kemi or Vaasa for 500€/month or lower and then just coast if you are willing to put in some effort. If you're willing to live with roommates, who may well be running the same strategy you are, it becomes even easier. (The downside is you then have to live there. Many of these areas have record high unemployment rates, for much the same reasons 3000 person towns in the United States do. Having done something like that for a year, I can report it felt like living in cryostasis.)
So there's arguably an oversupply of Finnish housing in these remote areas, and most of the country is correctly classified as remote (seriously, look at a map, Finland is huge for 5 million people). One interesting mechanism which might help curb that oversupply in the coming decades is the 15% inheritance tax - many people who live in these areas are older and don't want to hand down e.g. a $50,000 valuation home to their kids and then force them to somehow pony up 7.5k in liquid capital. That incentivizes them to sell sooner rather than later.
The more interesting question: Has Finnish housing supply growth in areas like Helsinki, Tampere and Turku kept up with demand growth? I suspect that no matter which country we're looking at, the one which answers that correctly today for their largest cities will be the best place overall to live 10 or 20 years from now. Personally I'll always prefer Finland's massive concrete suburbs to the endless, pointless sea of single family homes I grew up in in the States, and I hope we keep building more of them!