I would do as much of it as I can and only hire someone to help if some items are just to heavy for you to carry. Post construction clean up does not have to be awful, if you approach it only after thinking it out. Of course, you first have to remove any debris. Then comes the actual cleaning of all surfaces. That part, to me, is easy. It might not be a good idea if you have any respiratory problems such as asthma or COPD.
From what I have read, some junk removal companies ONLY remove the junk, and do no cleaning. Some may clean, too. Before you hire anyone ask a lot of questions and if you do not get clear answers, walk away.