Having had snakes since five and getting two retic at age 13-14 with the guidance of the colleges herp who has a phd, and a man in the herp society who had worked for the St. Luis Zoo and keeps many large snakes, I would suggest against it. They grow quick. Some are tempermental and bite. If the bite causes them to lose teath and get mouth rot you get to treat a bitting snake's mouth everyday. After two year I gave them to the former zoo keeper. When I got them it was very hard to find for sale in the states unless connected. The former zoologist only agreed to get them for me because I had delt with snakes 9 years, my dad built huge cages for them, I was friends with he and the local college's herpetologist/biology department head. I also promised to give them to him if I chose to get rid of, which I did after two years. I did get to experience nasty bites, force feeding and treatin for mouth rot. I am happy they stayed healthy and went to a highly qualified keeper.

Not trying to rain on your parade, just food for thought. And about food, as others mentioned it is not cheap for these huge snakes. Perhaps you might want to try a nice coastal python first.