Bin,
I don't know your level of knowledge. So please forgive me if this is off base. However, If you've never done it before, you should read up on it. In my opinion, sometimes a hiring a good GC is worth it especially if you can't be on the job site everyday to keep things on schedule. Knowing who does what and what order they need to do it in might seem straight forward but there are always issues. If there's a problem that requires an executive decision and you aren't there or can't be reached, it can lead to costly delays. What if you can't make it to meet an Inspector and the next time he's available is next week? You need to know your what your holding and operating costs will be if you don't meet your deadlines by 1-2-3 months. What will that dumpster cost if you keep it another week? Utilities, Lost Rent? Communication with the subs as to timelines and expectations is key. It's not impossible to do. It's just not as easy as people think without some experience.
-JP