I will spend a little extra on a nice bed for them, only because it's kind of their own little spot. Especially when I had 3 dogs, I wanted them to have something of their own. I'd rather get something of a little better quality and not have to replace it as often. We would clean them periodically, especially if one of them would get sick on it, and I wouldn't want to get something that falls apart after a few washes.
The rest of the stuff on that list I avoided. Dogs look so uncomfortable in clothes, and especially when they get older and start developing arthritis, that's likely more painful for them too. I don't see the need for a stroller either. I know sometimes the pavement can be too hot for their paws, but I just wouldn't take them out walking on days when it's blistering hot like that.
