I am usually not the guy that tries to dissuade someone from getting any certain herp. I do think that anyone with the correct motivation, resources and knowledge can successfully keep 'most' animals. However, you really need to be aware what you are getting into. Jclaiborne is completely correct about the caging requirements. Black and white throats do have the propensity to become exceptionally tame, but this requires a TON of time spent interacting with the animal. There is always the chance that you will end up with an angry giant lizard, if not cared for properly. These guys get to be the size of an adult Labrador retriever, and fairly quickly at that.
If you have the resources and time, then go for it. None of us are in any position to tell someone how to make their own choices in life.