Regarding older Medium Format bodies

Now consider that for $3000, you could get a 36MP D800.  That's a saving of $1500 over that 22MP back, and you still have to buy the camera AND lenses.

Just be aware that medium format digital is EXPENSIVE.  I have shot with Hasselblad, Fuji,  Mamiya and Bronica medium format cameras back in the film days.

I even had a Mamiya 645 AFD with digital back.  I recently sold off all my MFD equipment and bought a D800E to replace it.

Just saying, give it plenty of thought before you leap.

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The greatest of mankind's criminals are those who delude themselves into thinking they have done 'the right thing.'
- Rayna Butler