On this forum, we tend to get hung up on the details of the mirror laws - 200 feet back, 100 feet back, 80 inches wide, protrude no more than 10 inches, vehiclewidth+20 inches, etc. Many of these laws seem to have been written for trucks, and then may (or may not) be applied to cars. Though I normally watch the laws pretty closely, in this case I think I opt for safety as the first concern.
One of our first discussions, in which we laid out the basic principles, was this one.
http://www.trailmanorowners.com/foru...ead.php?t=3658
There was a lot of good followup comment in this thread, and over the years, there have been a number of further threads. I would suggest you start here, then find and read some of the other threads, and then decide. There is no magic answer...
Bill