Hi everyone!
It's been a little while since I annoyed everyone so I figured that I would request help with my latest dilemma. I have a 55 gallon reef tank(currently without the reef)

with 45# LR, 40# LS, a 10 gallon fuge with new chaeto, feather caulerpa, and grape caulerpa, and a wet/dry with a sealife system skimmer.
I plan on getting coral for it in about 2 or 3 weeks. Do I need to buy pieces separately or do corals not have the same effect as adding new fish do, where you have to wait for the tank to adjust to the new bioload before you can add more? I was planning on getting a bunch of zoa's (probably about 10 with about 8-12 polyps each) and a couple of lps frags. I wanted to just mass order quite a few from ebay (the sellers recommended on 3reef of course) but I want to make sure that this would be ok for the tank. Any opinions?
Currently, I have 2 blue/green chromis, and I just added a coral beauty 2 days ago. (My cats love me)

.I'm not planning on adding anything else until I sort out the coral situation, except maybe a cleaner shrimp.
Any help is appreciated. Thanks.
P.S. How long do you all recommend that I wait in between adding fish? I added my CB about a week after the 2 chromis, but checked the water before I bought it and water params were very good.