Design and illiustrate 25 2D monster sprites for an online RPG

I need a lot of art for an online RPG. This bid is for an initial 25 images that follow a similar art style and with a similar quality to the attached images. You must design and illustrate the monsters yourself so some creativity is necessary. If I am happy with the work, the winning bidder will receive all future work for this game if they want it. It is a long term project which will need several hundred monster images, as well as several thousand smaller images of equipment (weapons, armor, potions, etc) and several other categories of images, so please make sure you are able to do all types of game art. An interest in gaming would be advantageous. Please show examples of any similar work you have done previously. If you have none, then perhaps drawing a monster or two would help in deciding on an artist. I have a relatively low budget whilst the game is in development, so bear that in mind when placing a bid. I have a lot of images already so the art style preferably would follow the style of the images already designed. Thanks.