Buying a property through a realtor who knows nothing about real estate investing

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My cousin (through marriage) is a realtor/real estate broker and she's trying to help me buy a house. I really like that she's willing to help but she absolutely knows nothing about real estate investing. She's doesnt know about wholesaling (which is fine) by when I told her about my buy and hold strategy, she asked me, "why are you trying to buy and rent it? Not trying to be rude but how is that going to benefit you?". She's also asked other questions like that like she has no idea. Should I find someone that atleast knows the basics of real estate investing?

Also, I did explain to her my detailed strategy on how the buy and hold strategy can be beneficial if I do my numbers right. But she really does not understand.