In new news, we're going to be renting a dumpster soon, like maybe starting next weekend. Around here you get them for a week, and can extend if necessary.
I don't know what size yet, but this has been a long time coming. To start with, we have a decrepit old grill and a couple of other outdoor pieces that will be the first things in there. There's a little couch-type thing in the basement that's good for nothing and needs to go, along with a large room-size rug that it's been sitting on that's in terrible shape. There's an old bike in the garage that in my expert opinion isn't worth the effort to refurbish. I have a ton (like, about fifty years) of National Geographics from my family and another person that it would be a huge effort to even give away, so there's several more feet of space I'll clear. OMG, I think there's even an old TV and some electronics that are shot.
All of that will be done on the first day, and over the next few days we'll be going through the house and tossing other stuff. None of it's anything that's worth giving away, let alone donating. We've needed this for a long time. Can't wait.