Still working out storage and a few other things on my weekend warrior build, but wanted to report that a cheap tri-fold queen sized mattress with a california king duvet cover around it work great. I wanted the duvet cover to be oversized so I can still fold the mattress up and put up the 2nd row seats when needed. The back two panels of the mattress needed to be trimmed, which I found a box saw made quick work of.
https://www.amazon.com/gp/product/B07KWDBZZQ/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B00GH2Y1V4/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
My mint 2015 needed the trans rebuilt at ~62k... luckily I'd just bought it a few months before as a CPO vehicle with a one year powertrain warranty. Dealer said I'd have been out about $3500.
I believe the trans does fine with highway miles, judging by the number of reports of 200k+ vehicles that are just a few years old. Around town with lots of shifting may be a different story.
Lots of brakes, because of lots of salt. A couple of batteries, and 2.5 sets of tires , and a set of plugs and oxygen sensors Regular oil changes and 4 transmission drain and refills . 103000 miles so far.
The real question is do you feel Lucky?