Update: we’re live @rimworldporn
Hello, I am the founder of /r/RimWorldporn. We would like to move away from Reddit and are looking for a good alternative. We are kind of like /r/earthporn, so we require hosting of large images. We’ve been around for about 4 1/2 years and have accumulated roughly 30GB of images. The main advantage of Reddit is that it hosts relatively high quality images, for free. Would kbin be a suitable platform for this? We could host our own instance, maybe even centralize image storing on it.
Self-hosting your own instance might be the best way for you. You can surely use kbin for this. But I would recommend you to check out Pixelfed, which is focused on image sharing and is a part of the fediverse. A dedicated pixelfed would meet your needs really well.