From L.A., your Genial Host today learned “the rest of the story”. 
By email at 4:30 on Friday, from my bank, “me indica que el dia de hoy se le esta haciendo el deposito, de la operacion de xxxxx xxxxxxxxx xxxxxx, por un monto de $48, 678.42 en la cuenta xxxxx”.
In plain English (or Spanish), faced with the imminent prospect of having his loan sold to me in another week and then foreclosed within two weeks more, our client completed the paper work necessary to comply with his purchase option agreement. Yes, gentle readers, the clausula especial does work.
Case closed.