What shall I do?
Remove all admins and do all myself, as a full-time job ?

You are at a bad place for complaining about filling the HD: with all the pics you rehost on pics.imcdb.org instead of linking to original ones, and multiple posts for identifying special vehicles (for which I am grateful, but you still often post a lot of comments for a single vehicle, where just a short summary in one post would be enough)