Agree with Cajun.
And yes 5 years is enough xD even during, accumulate in a bin labeled "bettas" some of what you need that doesn't expire, like baster, punp, hose... All that. That way it isn't expensive all at once to get all supplies when you do get around to doing it.
Breed for the breed, not for the money; the words any REAL breeder would understand.
You must know nothing in order to know all, for all is nothing and nothing is for all.