Hi, I am located in Rhode Island. A customer of mine has asked me to relocate about 5 holly bushes which are about 5 feet tall. I was told hollys have a really big root system. The customer would like to move them the earliest possible as he has birds that nest in them and he wants to move them before the birds nest. When is the earliest I would be able to do this? What tools or machines would you recommend? Thank you..