For those of you who don't need that 100MP sensor in the Fuji GFX 100, here's the GFX 50S with the battery grip. I really like how the shutter release can't even make it over to the end of the camera. Yet, knowing Fuji, it probably feels great in the hands.
I've seen used 63mm lenses in the $500-600 USD range. Used GFX 50R bodies go for about $3500 USD. Get the Techart GFX to EF AF adapter which happens to work best with Sigma Art primes (designed to have a big image circle). You can get a pretty nice portrait setup this way.