THE BUSHINGS ARE SUPPOSEDLY CRACKED( ?)WAS ADVISED TO REPLACE BOTH CONTROL ARM

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MY CAR LEXUS 300ES 2001 HAS ONLY 87000MILES.I WAS TOLD THAT MY BUSHINGS ARE CRACKED AND THAT I NEED THE REPLACEMENT OF CONTROL ARMS 1..WHAT MAY BE THE CONSEQUENCES OF DELAYING THIS REPAIR? SO FAR I DID NOT EXPERIENCE ANY UNDESIRABLE SYMPTOMS WHICH COULD BE LINKED TO THE BUSHINGS PROBLEM. 2WHAT SHOULD BE THE APPROXIMATE COST OF THE PARTS AND LABOR? 3 IS THE WHEELS ALIGNMENT NECESSARY FOLLOWING REPLACEMENT OF THE CONTROL ARMS?