I am doing a palm tree installation in the next couple of weeks. It will be 7 16-20 foot sable palms. I am in in the mid GA area. The nursery said these larger palms will withstand the cold and I won't have any problems. It might dip into the 30s a couple more night in February. Should I have anything to worry about? How do you guys stake them? Also I am getting them for $10 a foot... sound reasonable? Here is a pic of what I have in mind.