I'd agree with all of your suggestions, except maybe the cold brew maker. I've found using a french press works pretty much just as well and you can make hot coffee in it too!
The real curveball, that honestly might be unnecessary, is a new shower head. My last place had an awful one, it would push out a ton of water really haphazardly. The QoL upgrade when I finally (after 1.5 years of suffering) bought and installed my own was kind of upsetting. I got better pressure, better coverage, and the hot water lasted longer since it was using less. For $20 and a few minutes of install my life got so much better. And if you have the ceiling space, I think an extender isn't a bad idea either: you can sort of get the "waterfall" effect without splurging on a high end showerhead.