To unbolt and rebolt is not complicated, but you need to make sure that it hangs correctly. However you also have electrics to deal with, windows, mirrors and door speakers. These are not that complex, but you need to record what you have disconnected so that you know how to re connect. If not sure then a workshop manual would show you all the detail that you require. Other than that get a quote from a local good garage (before you put the car in). Should only take approx one hour of labour.