If it includes real estate acquisition then $500M isn’t very much for new sites, especially if Musk is talking globally. My guess is that most new Tesla sites in the US going forward will be to provide a network for the Semi. With gas station companies racing to put in chargers for cars, the rationale for Tesla to do the same is much diminished. Makes more sense to partner with companies like Sheetz, which has been part of the Tesla plan for almost a decade as noted in this 2016 article.
By 2022, 70% of Sheetz chargers were Tesla superchargers. Sheetz Sees the Future of EV Charging | NACS’