times in seconds is the total time for make the tutotorial
and then for make an image!
And yes Alpaca is free for 100 images every day!

so 20 +5 = 25 seconds for make the first image
then 5 seconds for make any more image from the first one! ;)

Example with another one free one Ai Vizcom! ;)
https://www.vizcom.ai
(with the same Moi3D tutorial)