I want to do something like this

mine will be smaller. The wood cave is 4" diameters and 10' tall. I plan on having white branches and hanging blue white and red poms. and............maybe some crystals. Anyhow do you girls think I have to use manzanita branches if so how many? Or can I use branches from my back yard? If you have seen centerpieces along this style with regular branches ( I have no clue what kind regular is LOL) can you please PIP. I havent seen one and its making me come to the conclusion that I have to use manzantia.
Sorry also do you know a cheap reliable place or even better a local store to buy branches? Thanks