Hello, my name is XXXXX XXXXX X'X here to answer any of your electrical questions.
That all depends on how the house was wired. Do you have a attic access and is there enough space for you to crawl around in?
Do you still want to keep the half hot receptacle working with the existing switch?
Depending on how your home was wired there may, or may not be a neutral wire in the box that the switch is in. You would need to remove the switch and take a look. Would you like to do that now, or would you like me to explain how to do it assuming there is a neutral wire there?
About 2 hours, including assembly and install of the fan with 2 people. It's not difficult. The worst part is being inside that attic, depending on the weather. Where I am at it's hot. If you live in a cool area, it's even easier.