Don't buy anything without trying it first !! I don't care who you buy it from. I would look for a proven hound and one, maybee two pups no more. I hunt any breed of hound that will get the job done. I also have two to Kemmer curs that I hunt, they are the hardest treeing and fastest running things I have ever had, they also learn real fast. But you need to be careful, there are more crap curs out there than hounds, but a good one is unreal.
You will have to develop a thick skin though, die -hard houndsman cant stand the thought of a cur dog, My uncle who started me in dogs twenty some years ago wouldn't even talk to me for a year. But guess who has a cur at his house now.
I firmly believe you need both Good luck.
Ps, buy a mule along with the curs you can get the ragging done for both at the same time.