Opening multiple lines of credit

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I am a victim of the real estate guru classes, but I think I may have learned some tricks from them. One of them was the crazy opening multiple credit cards with $10K that is available. I was wondering if I could do this with Unsecured Lines of Credit with the banks? Any feedback about this??? I was also wondering if I wanted to buy a vehicle, should that be done first or open up the lines of credit first???