No problem...if there's something I really know a lot about, it's cars...so racing games are usually the ones I jump on first, lol.
As far as wheels go...I only have experience with my brothers setup (which is pretty elaborate for a normal user). He has a Fanatec GT3 wheel with shifter and full pedal set, an adjustable Recaro seat and frame for the seat and pedal set. To me, even with the force feedback in the wheel and pedals, I don't really think it feels "realistic", at least in comparison with what it costs to have even his setup (there are much more elaborate ones with hydraulic frames and stuff that move, and even those don't really feel "real" to me...and I've driven many cars on a track in real life).
At the end of the day, to me, I can't see justification in the cost...but my brother, he would argue that he'd never own a racing game without wheel support. I guess it just comes down to how much you enjoy the immersion...I found it a bit gimmicky since it didn't make me feel like I was really driving a car, it just felt like I was playing one of those old arcade games you sat in to play. To me, if I can't enjoy it with a controller, I'm not really interested.
My brothers setup cost him about $1,500 all together with wheel and stuff...he's also had to replace the rubber banding system in the force feedback unit of the wheel because I guess they are prone to breaking (I'm sure they've upgraded this since he bought his in 2013 though).
That and the wheel setups are EXTREMELY hard to master. I'm not sure how familiar you are with racing and stuff, but Randy Pobst (test driver for several magazines and instructor at Laguna Seca) is a close family friend, and he tried my brothers setup and said "This is too damn difficult!"...that guy has won over a hundred road races in his life and he gave up after about 10min on a wheel setup, lol!