Give your local store a call. They can walk you through the options and the cost.
2015 dodge journey with push to start system, you can do RSR with the factory key fob (press lock 3 times) roughly $280-300. For 2 new key fob for futher range $340-400 depending if you have a factory alarm.
It would be better if you called the store. This is not the place for these type of questions.
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