2005 Hyundai Tiburon control arm

I was curious how much a control arm would cost for me to order a control arm I was looking on line for them and I found a few that were around 80 to 100 dollars and how difficult they are to put on. Note im on a military base with limited access to tools and space to work. Would I need to compress the rear springs to do so. The syptoms are my rear passanger tire is cocked out im not 100% sure about wat it is. My friends told me control arm and I had no clue wat to think. Just need some input on price and difficulty level.