The set up sounds fine. The minimum for her, in my opinion, is a small rat every seven days. I maintained roughly 20-30 adult boas plus seasonal offspring for almost 8 years and that is what experience has taught me...some one else does it different and also has pristine specimens. I always let my personal boas decide on their own, my female was always voracious, therefore I fed her well...my male was never so therefore he did not like frequent feedings. Both are beautiful adults now with well rounded physiques...do what you and your animal is comfortable with. I started biweekly feedings at the 5-6ft mark.