How long does it take to replace all motor mounts? on 2005 Toyota Avalon

My dealer states 7 hours to replace Dogbone, Front, and Side mount.

Asked by for the 2005 Toyota Avalon
My labor guide shows a time of just over 6 hours. There would appear to be some overlap on this job, so I bet if you were to call around you could get a better deal.
I have a hard time believing all the mounts are already bad, how many miles do you have on your Avalon? Are you experiencing vibrations from the engine?
I would get the missing bolt replaced and get a second opinion, it's unlikely you need all the mounts replaced.
114K miles. I thought there would be some overlap too. I noticed a rattling noise as I accelerate and found the one of the bolts holding the right side mount was gone!