"When do you plan to leave for the Kingdom of the Waves?" Elen asked, right after Minos answered Elena's question.
"In a week at most. I still have some issues to resolve before taking this trip."
Elena then stared at him and asked. "And how long do you think this trip will take?"
"Not too long. Probably I will be back in a little more than seven months.... If I'm lucky, I might be able to spend less time there." He replied after doing some math.
Minos would travel with Abby on this young woman's beast, an earth-type, at the 4th stage of cultivation. With that, the trip should take around 10 to 15 weeks, considering that they wouldn't make the trip all at once, without stopping to train.
Other than that, he and Abby would have many issues to resolve in the Kingdom of the Waves, buying all the resources that the Black Plain is currently in need of and those for the near future.