I made, tested and released this map in 4 days. Had nothing better to do that week, so I worked on it about 6-8 hours a day. It is 130ish territories, has quite good artwork, has a unique bonus system, and required tracing from real maps. So for a simpler, smaller and fictional map, it would take me around 16 hours? Am relatively experienced with Inkscape and use lots of little tricks to save time, so maybe it would take a newbie 24 hours?