You’ve got more ambition than I do! Good luck! I love the old variety of nandina, much better than the dwarfs. Hardier, too.
At least I haven’t had to water outside the last couple of days!
These are hard to keep tamed out at the front..I cut them way down this spring..but the berries are lovely now..The one in the patio bed I just keep down enough to keep it from hitting the top of the lattice over the area. It was a volunteer..and gives me a place to enjoy lights at Christmas time. It had nothing but rainwater and thrived.