I've been considering adding a roof rack to my 2011. I saw ebay has some cheap ones and the install process seems very simple, though wind noise is a concern (especially with the cheap ones, I'd imagine)
AFAIK the install process is just a few bolts on the existing rails on the car (there's little covers that pop out and allow you to install the rack.
I bought mine on Amazon for $ 89.99, $230.00 less than the dealership. No wind noise as the crossbars have an oval taper. Have had them on the car since 2016. Great product. Easy to install. Mine required a torque wrench i think it was 14 lb ft.. Here is the ad.