This seems to be something people don't always give second thought to. When people talk about the homeless, the first things thought about are images of people on busy city streets in rusty clothes waiting around near allies. In there, the answer is quite static, because it can be I guess. But if that's the case, change the setting and that changes too. In the places where I've lived, people often needed that mapped out. Where are they known in your rural locales?
There are many social programs, but the biggest one is "Expense assistance", where the state will make sure you have minimum amount of money required for living after income. In practice it's around 600-1000€,just enough for the cheapest rent and cheap food. However that's all you need to get back on your feet.
Its calculated after income, so you will only receive the bare minimum needed for basic living. However if you want to live in a small apartment with no actual disposable income there is nothing stopping you. Thats actually how some students get by.
I don't know how it works in Finland, but in Latvia there are no homeless in rural areas because they can't survive in the winter. You either have a home or you don't exist.
Not even in just the Summer? Or anywhere where they can crash at another's place? I find the Winter thing strange, where I live it can get to negative twenty degrees and that doesn't stop homeless people from existing, because they're clearly visible on one's way to the town hall.
I would imagine the act of losing one's home doesn't cease to be possible just because the state of actually not having a home is deadlier for part of the year. Hard times are hard times no matter the environment, no? With having a roof over your head not necessarily freeing one of that status, as shown by the fact some go to abandoned buildings, albeit in rural areas, the fact that it depends on more things inspires the original question. That in turn doesn't mean rural homeless don't exist, and the issue of awareness in part inspired me to ask.