Hi,
still it is quite big model and the computation of the needed space is not exact.
During the texture computation, is something happening in the console view? Like, are there added new lines? What is written there?
Also, if you check the computer activity, is it doing something during computation?
Where are your images stored? There was a similar issue solved by changed image path (Texturing hangs and stuck at 40% - #5 by jjeerriieell). Also, can you check if some of your images aren’t corrupted?