If budget is a constraint, look into open-source launchers. They provide high customization safely:

Nova Launcher is a highly regarded, legitimate home screen replacement for Android devices. It allows users to deeply customize their user interface.

A: Possibly. But because the mod may break the licensing handshake between Nova and Sesame, the deep search integration might fail.

Be sure to check the reputation of the APK hosting site and the modded APK before downloading, to ensure your device's safety.