I'm at work but I fired up Skitch and made this ridiculous little drawing, which should explain the situation somewhat. http://www.nybergh.net/stuff/linked/2019/08/hifi-cottage.png
Basically, we're using the corner of the L-shaped kitchen+living room space to our advantage by moving the couch a bit and pointing the speakers there. The sub sounds super clean anywhere near the convex corner with the fireplace.
I find that the biggest challenge is the stereo sweet spot, which always is going to be annoyingly garbage and narrow with two-channel stereo. The subtle room reflections help a bit, and we rotate seating to make it a bit more fair.
I read renowned Harman researcher Floyd E. Toole's 'Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms' and he seems to agree that there's not a whole lot that can be done about two-channel stereo. In fact, Toole rants in favor of three front channels quite a lot, and well as mocking audiophiles who think their rooms are going to be likely to not need basic tone controls on reproduction gear. https://www.amazon.com/Sound-Reproduction-Psychoacoustics-Lo...
But back to business, with this nice house we don't really need to do much. The log walls absorb a lot, while leaving a nice little lively touch that makes it not feel like a padded room (one of my friends had a padded room before for music, and I've decided I definitely prefer a room that feels a little bit alive).
My friend has this DSpeaker Anti-Mode 2.0 for room correction http://www.dspeaker.com/en/products/20-dual-core.shtml
The same friend has two Genelec 8330A active speakers that could do room correction on their own https://www.genelec.com/studio-monitors/sam-studio-monitors/...
Then we have a previous model of the Genelec F One form factor subwoofer, I can't remember the model number, which is alphabet soup, even though it's connected to my system at home. https://www.genelec.com/home-speakers/f-series-active-subwoo...
The Genelecs are both compact, durable and easy to transport, and we have telecope model stands for them. They have a super nice mid range for guitar and the human voice, and they're also quite nice to look at.
When we set up the space, we basically let the DSpeaker box do its frequency swipes for ten minutes or so. We'd be fine without it even, but it just clears up the bass so nicely.