I totally agree with Bogertophis. As hard as it may be to "hold off," it's probably best for all involved.
Having said that, it's great that you are considering finances and costs when looking at acquiring a reptile. More people should do that. Thinking about future living arrangements is also a good move. So is how many reptiles you realistically want or can care for, etc. Opportunity cost is another factor. If you get 5 BP's now, and decide you want a Boa and/or a carpet python later, you might not have the time, money, or space.
Many people get excited and "go for it" only to release the costs at a later date, or how big the animal gets, or how long it lives, etc.