Yes, we feel you should not have any issues making room for comments on your image. The comment area takes place on the image itself, similarly to how you make comments on video. The difference here is there are multiple frames of video to make more comments, while images are just a single frame.
How you can make more room for commenting though is to utilize the zoom functionality. Located below any image hosted on Wipster, when you zoom into the image, the image size will increase and older comments will hold their position on the image where you originally made it, making for more commenting room and making it easier to find comments in the zoomed-in state.