Let's be honest the only people who will be able to get all the way to area 40 is people who have plenty of money to spend on stamina charges. F2P players will struggle like hell!
You don’t need money to finish this event, it’s more about putting time in the game. im actually going for just to finish the area ASAP to advance, then I’ll go back to finish the areas completely. Plus areas you explored stay saved when you come back to it
also fyi, im on area 34 since the new areas have been added. so within another 2 days tops ill be able to get all the rewards from in each area then go back to finish to clear all the treasures. my Elv level is 19 with 90 Stamina