Don’t think of it as a cheap source of heating, unless you’re a forester/farmer/joiner/tree surgeon.
Or forager, my B-i-L seems to be quite good at picking random flotsam and jetsam up for his wood store.
I needed to get my chimney stack sorted out, so got a flexi flue put in as part of the work (intend to just burn dry wood so had cheaper 316 grade flexiflue installed), no idea if the chimney needed it. Bought an ex display model stove on ebay at near half price. Despite trying to do it on the cheap(ish) I still expect it’s going to cost a few thousand for everything. Also having new central heating installed, so mine will probably end up being more looks/play thing.