Of the budget radio systems out there, I would consider Radiolink fairly decent which offers the gambit of crawler functions:
https://www.amazon.com/Radiolink-2-4.../dp/B07DPMVVKN
The following review is on an older version but should give you an idea of the quality and basic operations where the newer versions offer a few more features:
https://www.youtube.com/watch?v=wNhWNE4jupM