photographer near Fort Morgan, AL

We are looking for whole family photos (14 people), max time needed for that is 45 minutes - 1 hr. We will be in Fort Morgan, AL from 7/13-7/15. I personally, am interested in another 30 minutes for my family (3 people) and unsure if other family units will want time. Is there any way to get price for the whole family time and then what each additional 30min-1 hr will cost? Thank you