Would cost to replace front bushings & arms be $2000? on 1998 GMC Jimmy

That's what a Firestone dealer said. Also that if not done the wheels and/or engine could fall off while driving or even when parked from the weight. Is that true? Can it be driven at all before fixed or is that not safe? Thanks.

Asked by for the 1998 GMC Jimmy
I think you need a second opinion. something does not sound right here. the bid is high but you give no details on the charges.