The 70% or 30% to OCA is the DMF less refurbishment costs. Time frames are difficult but for villages the average estimate is 7 years.
And no it's not rent it's just the deal when someone signs up front.
The rent is if OCR didn't sell what would the rent be on the unit over 7 years? I can tell you it's a lot higher than the DMF.
Where they can that up is on capital gain if it's available.