When there's something you know you really want to do and circumstances are all lined up to support it, but it's a really big leap, ask yourself if the regret if you don't do it outweighs the risks if you do.
It's good to plan, it's good to have safety nets and it's good to keep yourself from getting over-extended in general, but sometimes it is the right time to stretch.
Don't make yourself miss out on the good, but hard stuff just because it's hard.
Go for it!