Hi there, I have just finished talking with a local marketing consultant about a product, and the product goes by the name Fat Panda (I know right!). Creativity is indeed crucial in advertising, especially in Facebook environment. Not only that, I'd say execution is of equal importance. I can manage After Effects for simple composition, Premiere Pro for video editing workhorse, InDesign for layout, and Photoshop for image preparation and editing. From my experience, those great four software are enough to handle both image and/or video based advertisements.
I have no idea what kind of advertisement you're looking for, so I set my bid on 40, because I feel from my experience, it's kind of ballpark price for either format of advertisement (even though image based is usually cheaper, and video based is more expensive), 250 euros is just an overkill offer.
Looking forward to working with you.