So I went to change my oil and noticed the whole bottom where the trans cooler is was covered with oil. Then I noticed that my power steering level was down. How hard is it to change out the power steering system?

Thanks

 

Where is the leak coming from?

It could be just a line leaking or something simple. No need to talk about changing out the whole system at this point. The rack and pinion and pump are the most expensive pieces and you can look up prices on line if you want, but I'd find out what's leaking first.