No.. Very poorly available at the moment as it is in high demand.
It depends on what you need. The A7R is a megapixel monster... the X-T2 on the other hand is a very good all-rounder even for sports. The AF system is superior to the A7R.
I have 1-2 colleagues who switched from Nikon or other systems to Fuji and now don't even shoot RAW anymore.
2 batteries must be ordered separately for the handle. However, also the new ones, not the older ones, otherwise the camera can get stuck depending on the situation...
Correct batteries: Fujifilm NP-W126S battery (rechargeable)