The mission Riot or craze would be my choice. The Riot is a little longer ATA, and where she could end up being taller i would go with that one. Either one is completely adjustable from 17"-30" in DL, and 17lb -70lb all with the turn of a screw without a press.
As far as the poundage for hunting I would try and get her near or up past 35# mark. with that being said I know two women in their 60's who both hunt below 40# who use with great success rage BH. both have killed numerous deer and numerous bear. I am not sure about Texas but many states have a minimum poundage required for hunting. you may want to check with the fish and game Dept. about that. Good luck!
Straight shootin!