The first step when deciding how to rehab your house is figuring out why you are rehabbing it. Are you an investor looking to flip or fix up a rental or are you looking to make a few repairs on your personal residence? I think investors should almost always use a contractor to make repairs, because of the time and money it will save them in the long run. I discuss why investors should use contractors in much more detail here. Investors have to look at how much time it will take them to complete a rehab versus what their time is worth doing other activities. I completed a rehab a few years ago and it hurt the rest of my business, because I ran out of time to get everything done.