I would not attempt any body repair on your own. I tried, didn't know what I was doing, and ending up needing to fix it instead of wanting to. So it's worth it to get it done right the first time. I know that body shops have basically set costs to fix bumpers, doors, etc. due to insurance costs. That cost includes paint and disassembly of the panel, and the unique cost (which only varies about 1% across shops) comes from each shop's estimate of time to fix the damage. So my advice is to go and get an estimate and have it done the right way, because chances are if you've never done body work before you'll spend all the money on supplies and end up taking it to get fixed anyways, possibly with more damage than initially.