I'd say the toughest thing for is figuring out how to manage fees so that I can become profitable. It's not as easy as "setting it and forgetting it." You have to monitor the inflows and outflows of each channel. It's not easy doing this manually because I don't have that kind of time to provide that level of care for my node. People have figured out how to automate lots of the processes, but I'm not a coder so I have a disadvantage.