I ended up getting WiFi blind chain motors from Aliexpress. This allows me to integrate with the existing blinds that have chains. Also, if I ever need to remove them and go back to manual, it's easy.

There are a ton of these on there. Here is the listing I ordered from: https://www.aliexpress.com/item/1005005461906004.html

I spent ~$40 per blind. They go on sale sometimes.

(not affiliated in any way)