If the Iberian Wedding didn't exist then yes, 1000 months mtth would be quite high considering the other WiH events. But the Iberian Wedding does exist. So 1000 months is reasonable.Also, isn't the 1000 months mtth sort of insanely high for a 1450-1504 period? The rest of the Women in History ruler events are 200 months mtth.
The dynasty name is also a bit of a mess (Trastámara)