We just spent 31 days without our trailer due to a hub failure caused by a broken axle weld. Actually replacing the two axles only took a few hours - less than a full business day. Waiting for the extended warranty company to decide if the repair was covered, waiting for the company to get a set of axles ready for our rig and shipping took a month.
We were lucky the failure happened only a few miles from ExploreUSA in Mesquite/ Dallas - where we bought the trailer. Their company has a policy that if you bought the rig from them, it goes to the head of the line for repairs/ diagnostics, etc.
We stayed with my daughter, three of her children and two dogs.
We didn't plan for that - just got lucky and avoided paying for a motel for a month.
If we weren't in Dallas, likely we would have taken the rig to a park where we could stay several weeks and wait on parts. It would have been expensive to move.
Over the years, I've found that for most general repairs - a Mobile RV Tech is best. Simply because he gets paid when he finishes the job. Those guys can't have twenty rigs sitting on the lot waiting for parts, or a slow day to get to a couple.
I've replaced a water pump, a hot water heater under warranty, and had a couple other things - all done quickly and efficiently by a mobile repair guy. From Fort Lauderdale to Connecticut to the San Antonio area.