Bus trip Zihua to Puerto Escondido

Thinking about taking a bus to Puerto Escondido and then from there to Oaxaca and reverse back to Zihua, just a site seeing trip, not in a hurry but don t want to drive myself. Dont want to fly to Mexico if I can avoid it .

What is a realistic estimate of time on the bus from Zhiua to Escondido with a transit thru Acapulco? Can this be done in one day if a person starts early?

Also what is a reasonable estimate of bus time from Escondido to Oaxaca now that the new road is open?

I am thinking of making the trip on Jan 7th so much of the Navidad traffic should be over. Gracias