First of all, on a car that has been in service for at least 5 years, this is not a warranty issue.
I agree with Remco that the noise is likely to be the result of worn CV joints. It is possible that the struts and tie rods are also involved, but I think that this is much less likely than a CV joint problem.
However, because that estimate seems very high, I strongly suggest that you take the car to another mechanic for evaluation. Don’t tell him anything about the prior diagnosis. Just describe the symptoms, and allow him to provide his diagnosis. More than likely, the estimate will be far lower.
How pressing is the issue?
If the problem relates to the CV joints, it is not that pressing, as long as you don’t mind being stranded if a CV joint breaks.
However, if there is indeed a tie rod issue, that IS a safety issue–at least in my mind.
But, if you don’t consider a total loss of the ability to steer the car to be a problem, then a possible tie rod issue may not be a major issue for you. I don’t know what your tolerance for loss of steering control may be.
(Translation: You need a new mechanic to diagnose the problem.
But–DO NOT go to Midas, Meineke, Monro, Sears, Pep Boys, AAMCO or any other chain unless you want a diagnosis that includes replacing most of the parts of your car. Look for a well-reputed independent mechanic in your area.)
And, as keith requested, can you please clarify “wheel is turn”?
When someone uses non-standard English, it is difficult to know exactly what they are trying to tell us.