Some people have had custom exhaust systems installed for less money. I am looking into installing dual exhaust at some point in the future also. The system you mentioned looks nice but seems a little expensive to me.
I was looking into the Jun B.L exhaust as well. However, I'm hesitant as I'm getting mixed answers from different vendors as to whether or not the exhaust will fit the North American spec Tucsons. So, I'd rather not risk spending all that money only to have it arrive and it's off by a few mm (only to spend more money to spend to modify what should've been a bolt on). I'm looking into getting a custom exhaust done in the future as well. As SilverFoxxx said, it's likely going to cost less money to go this route.
That looks like a sweet exhaust setup Rem 234 I will look into that setup I know the jun B.L is expensive no way would I spend almost $900+ for a axelback exhaust but I do like the rectangular tips. Hyundia should have put the twin duel tip exhaust on the 1.6T models!