The 3 second Animation quality you require is not only achievable but we can better it as well.
Also, We will make the 12 second Animation video as required using the woman model.
We'll also make changes in the 18-19 images that you have using Photoshop and then render them.
To better the 3d renders, We'd use 3ds max to light and render it. Our expertise in 3ds max and Maya is 8 years. This gives us the confidence to accomplish tasks like yours easily as over the course of these 8 years we've learned the tricks and tips of this art.
We have a couple of i7 8th gen and 7th gen pcs with 16 gigs of Ram each to accomplish this task.
As far as editing of images is concerned, We use Photoshop to edit the images.
Please contact us should you have any query.