Boas generally do better when they are paired one male to one female for the season. They are not like pythons that can go and go. And often a male will imprint on that female for the season and won't breed another until next season. This is a generalization and NOT an absolute - there are always exceptions.
Having said that, there is no reason not to have 2 females and only one male. Boas can have 30-40 babies in a litter so you might want to only breed one female at a time.
And that is a very nice hypo. If you like her, you should get her.
** Do NOT forget to quarantine!!! Minimum of 90 days for boas.........