Honestly wait until you move out and are financially independent where whatever pet you get can't be a possible burden to someone else.
You have to think long term and not just "what I want now". Deborah brought up good point you need to consider. As long as you live under your parents house, whatever pet under your care is potentially a pet they may have to take responsibility for if you can no longer look after it. Keep in mind not all college/university dorms or land lords are cool with snakes as a pet and not everything will go smoothly. You WILL hit a lot of bumps along the way and you don't want to learn that the hard way.
So it's not as simple as "oh I can just bring my snake!" A lot can happen in just a few years and with a boa that's 30 years you have to make sure you can commit to without interruption. If you want a boa now and are serious about it, you will definitely still want a boa 5+ years from now.
Also slow down, you're already aiming for a collection and "several animals" when a single boa can present enough challenges for future hiccups. Don't be so ambitious when you're not even close to being fully independent. I know this sounds harsh but you have to think about things realistically for the sake of your future snake(s), not just what sounds nice as a concept.