Reply to Beginner - equipment question and dilemma

Hi,
I want to start using gear in order to make some house mix etc... I am not going to play at bars, parties and something like that, for now anyway, because I want it as a hobby.So I started a month ago using ipad djay app, and virtual dj, anyway, I have been search searched a lot on the web in order to figure out what gear to use that I can afford, so, I found this: http://www.ebay.com/itm/Numark-Mixde...90888380801%26

Is that a good gear to get started(I know that its no matter what gear do I use, the only matter is the music I play and how good I know how to play it, but still..)?

And, I have a dilemma, should I buy full package controller, or buy each gear separately, because, in that way I can upgrade each item over the years, and not replace the all unit, what do you believe about that?

Regards,
may.