1. yes. depends on the price of the cage and how much someone wants to charge you to install it.
2. depends on cage design.
3rd question you didn't ask: Should I get this car that's probably too much for me to handle even though I'm still a minor, and have probably only had my license a few years?
3. no. Have fun with your Beemer and learn how to drive. Go to autocrosses and such.
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