Gio and Sauzo seem like the main retic guys here so thats who you want to listen to without a doubt.
I know you said "future"....and that's definately the right move. I wanted a giant for years before I got my Burm (today actually lol) and had to wait a LONG time because I knew better. Things to consider:
Food costs....rabbits get expensive and retics can eat a lot of them if big enough.
Caging costs....expensive
Your living situation....this is big in my opinion. If you rent, or ever plan on it I would absolutely hold off. 99% of landlords arent cool with a 10+ foot snake in their building and its easy grounds to evict you.
I waited to buy my Burm until I had a good job and my own house.....but boy was there ever temptation along the way lol.