I just did it couple weeks ago. Never saw a wing until I bought this in May.
Good instructions here with pics if you look. I found them and printed them and took it out to the garage.
cost: $55 for belts from NAPA
time: about 4 hours, took my time. It is important to do it right so time isn't a factor here.
the only thing I would say is get down eye level when you mark the alignment and do it with a straight edge.
I was a little nervous the whole time but when I was done, had to say it was not hard.
My guess here is $250.