I do all 6 quests, every day, and it takes me 20-40 minutes to get all of them done. 40 Minutes is typically the fishing quests, which are incredibly easy and completely brainless to do if you have a controller. (hit your button to fish. Your controller vibrates, real it in. Wait about 5 seconds, hit fish. -> I can fish like this from out of the room and check back in on the progress from time to time.) The issue here is the % to actually get the quest fish must be ~1/3 at best. and even then, you only need a couple, so it's still only 10-20 mminutes of fishing.