I don't know how you manager to print it, it just needs to be made solid instead of a hollow shell. you end up using twice the filament that you should need to, 2.5 rolls by the slicers estimate. I attached a picture to show you what I mean. if it were solid then you could just add infill and use much less filament/supports. There are a few hollow places where the bode meets the base that you would never get support material out of as well. https://i.imgur.com/M1mcIi6.jpg

This model needs a lot of work to make it printable, the whole base is messed up when put in a slicer. it hollow, plus parts of the top disappear altogether. lots of non manifold areas too. If I knew it was like this I would not have paid the asking price for it.

Excellent work, I love the head sculpt in particular :)