How much does it cost?
I'm afraid it's one of those "how long is a piece of string" questions", that can only adequately be answered when all the requirements are taken into consideration. A drawing of a cat may not stretch your budget too far. If you want the cat sitting on top of the Eiffel Tower, with the 7th Cavalry charging forwards in the foreground, accompanied by a marching brass band, and the Red Arrows display team in full flight, then I'm afraid it will mean costs will reflect the extra work involved. There may also be other factors involved in setting a fee, including rights and usage.
So we need to talk. I'm happy to do so without obligation, and will always strive to reach a firm quote that is acceptable to all. Drop me a line.