If it takes that long, then you can just get the FE mugs as placeholders, and make the other ones as time passes... Like, let's say, you have some time here and you want to use it to something... maybe to do some advance at the portraits! yay!
I suppose that on some point, the process will be much more "mechanical", and things will speed up a little. And I think that's better if one doesn't pushes oneself too hard aha...
But clearly... it influences characters, so you have to make them too (although character graphics are much easier I think).
Anyway, as someone would say, just hear the inner voice (? it's... beating?), salut,
Orochii Zouveleki