My mom currently has SiriusXM built into her Chevy Cruise and I pay for the subscription, so I got a email saying for $50 I can get a Onyx EZ Radio with Vehicle Kit + Home Kit and 3 free months. Thing is I don't need the car kit but the home kit sounds cool. Can she listen to both the built in Chevy cruise radio and a home radio with the same account or will I need to upgrade the account so both radios will work = more money? Also I guess the home kit doesn't come with a speaker/s so whats a good cheap speaker that works with the home kit?