I don't know the size of the Wanhao, but it took ~1.3 kg for me. I used meshmixer to cut down on support material needed. **TUNING SUPPORTS IS KEY! YOU DON'T NEED AS MUCH PLASTIC THEN***
Speaking of time. Meshmixer cuts many parts from what would be 19 hours down to 11.
I didn't measure how much time it took total. I just set them to print when i didn't need anything else.