Rear Sway Bars

I was wondering, I understand that in order to install the rear sway bar, is it easier or is it REQUIRED to drop the subframe and exhaust? Also, has anyone ever had any experience on having their front and rear sway bar installed at a indy shop? If so, how much did it cost? I live in the Bay Area, and i went to a shop nearby, they said that it'll take around 5 hours to install, and their hourly rate is about $100 an hr...so that is around $500 on just labor, I think that sounds Ridiculously expensive for just the sway bar installation itself. Sorry if this question was already asked, but i could not find an answer to my question by using the search function...:( Thanks!!