If you're building a multirotor at home, the ESC is one of the most important parts in the build. The SimonK 30A ESC is a go-to for drone hobbyists because it's affordable, reliable and easy to calibrate.
Why SimonK? https://socialmarkz.com/story12412981/simonk-red-30a-esc-the-reliable-pick-for-fpv-quadcopters