I would say the hardest part was or has been just time management. I tend to get sucked into my projects and then I become nocturnal lol. Also finding people to help you out can be a tough one. For every 10 people I asked I got 1 but I was persistent. I'd say though if your going to do a large build make sure you got people to help, people who will commit to it because all it takes is one corner falling out and your putting your project on the shelf for a year.
