I'm happy to report that I actually completed a hobby recently! Bought a Wyze Robot Vacuum to root and install Valetudo, but it was being a pain in the ass and not even trying to start ADB no matter how many button combinations I tried, so I ordered a motherboard for a 'Xiaomi Mi Robot Vacuum Mop P' (same base robot) and rooted that. Installed Valetudo, replaced the very dead batteries, and set it free. It's now taken the place of my Eufy Robovac 25C, which will be cleaned and gifted to my elderly inlaws.

Wyze WVCR200S w/bad battery (eBay): $20
Motherboard w/pre-patch firmware (Aliexpress): $16
4x Molicel P30B 18650 batteries: $25

Not bad for a $200 vacuum that's now completely cloud-free. Worth it. It does a hell of a better job than the Eufy did, as well.