I found this example of an 8×6 floor plan on the Approche Paille forum. It’s someone with a similar budget to use (a bit more than us) working along similar lines. At this point in their build they were struggling with the conundrum of where to position their stove. In a comment further down the forum page they said they’d been advised by an architect to position it between the two large windows a the front. Good advice. That’s what we’ll do.
Since the guy who designed this is not to far from us, I’ll be getting in touch to ask whether we can visit to see how their build is going. They were submitting their permit last year and it looks like they’re now planning the foundations.