I had similar damage to my passenger side rocker panel. I took it to a Tesla Approved Body Shop and they said they estimated the repair at just over $13k. I took it to a Tesla body shop, and they did the work for just over $2k (that included a new 20" wheel that had a very slight grind mark on the rim). I asked why the big difference, and it was explained this way - Tesla body shops can "pull" dents but Tesla "approved" shops can not. They have to replace the dented body panels, which is much more involved and costly. Needless to say, I had the Tesla body shop do the work, and it looks brand new. It was a beautiful job.
I see you're in WA state too. I used the Tesla shop in Bellevue.