I had my site assessment yesterday. The Tesla Energy employee noted that PW3 won't be available until sometime next year and that he could put in the notes that I want PW3 and I could wait for it. However, we both agreed PW3 likely won't be available until 2H 2024 and that they will start with single PW3 installations first before doing multiple unit installations. He said most of the PW3 installations he's seen in NC/SC are for employees but of course there are trial runs being done for normal customer installs as well.
Couple things that people may or may not already know that I learned is it is a "few thousand" extra to have the Powerwalls installed in your garage vs. outside, $500 to have the conduit painted by Tesla, and a "few thousand" for hidden conduit. This will obviously vary by area and type of install, but made my decision easier to have the Powerwalls on the exterior garage wall. Pros and cons though as during the summer the outside wall will be cooler than in the garage (east facing exterior wall) but in the winter it will be much colder outside.
He also said he is very confident my install will be around mid-November and for sure by the end of the year, which I found to be a bit shocking. I wanted to see if it could be done by EOY so I could file it with my taxes ASAP. He said 3-5 weeks to install is very normal across NC/SC so I guess it does vary greatly based on region.