One of my recommendations to earn money with free player accounts is to hunt for bosses in the free zone, by creating several characters that will remain located where these bosses appear, so you only have to connect to that character and check if the boss is or no.
It is not necessary to review every minute, you can do it at intervals of an hour or two depending on your preference and during these intervals practice another activity to generate money, such as obtaining items for inbuements, hunting creatures.
For this I recommend you check the market and select the object that generates the most profit.
Below I leave you a list of these bosses for the first activity and the link to a similar answer with more detailed information, as well as a list of the creatures and their corresponding items for the second activity, luck and happy hunting
°Amazon y valkyrie = ProtectiveCharm
°Monk y Dark_Monk = Rope Belt
°Gloom Wolf = Gloom Wolf Fur
°Orc shaman = Broken shamanic staff
°Elder Forest Fury y Forest Fury = Elven hoof
°Giant Spider = Spider_Silk
°Bonelord= Bonelord eye