I have a customer that has lived in their home for 2 years. They would like me to replace about 70 feet of photinia with holly. The photinia is about 5 feet tall. I will remove them at the bottom with a chain saw. However, my question is how hard will it be to dig the root structure out? They do not know how old the photinia is, but if I had to guess I would imagine its been in the ground for at least 8-10 years.