Oh and a PS.
Do your research on tank cycling.
There are pros and cons to live vs dry rock.
The biggest differences,
Live rock will have or should have lots of bacteria and this is a huge +, it also has lots of unwanted pests that come along with it, Aiptasia, ICK or velvet, so use reputable known sources, look at it closely.
Real dry rock is pest and disease free, but needs to be cycled this takes time.
Just a thought as you have time to get dry rock and start the cycling process right now.
All it takes is the rock, a brute trash can or other suitable container, a pump for flow, the bottle of bacteria of your choice, saltwater, test kit, and a ammonia source.
By the time you get your tank the rock will be ready or close to ready.
You will need all the items for the tank anyway so its not wasted money.