The cost of creating a Wikipedia page depends on a variety of things. One is the amount of content that goes into the page and another is the amount of controversy surrounding the topic. (As this requires more effort to create or delete)
Cost can range anywhere from ₦100,000 to ₦1.2 million; however, most Wikipedia articles fall within the ₦150,000 to ₦350,000 range. Note there is a minimum charge of ₦50,000 for any editing, including minor edits.