This. If you bring the male home today then the soonest he should be put with your females is 12/6 or so, assuming he doesn't pop up sick between now and then. Once he's cleared QT you spend a few months pairing them, and after he goes home your females live in isolation for another 90 days.
Also bear in mind that you can find male banana BP's in PetSmart now, someone on Facebook posted a picture of one on sale for $299 (the morph was actually marked correctly, go figure). Personally I wouldn't bother with borrowing any BP that is showing up in the big box stores since by the time they get it, it's been over-produced.