first welcome to saltwaterfish .
the best things you want is to do first to buy this book and to get more information and knowledge base on saltwater. click on this link ;
https://www.saltwaterfish.com/site_11...945b0c5bc0bedc
and before you do something or get any idea ask here ppl will love to help you and save from you mistake , and money.
if you want to run on the same tank in short time it's better to build your system from the begin for coral , because it's different then fish like : the ligthing system for coral you need total different lighting and more expensive then for fish.
you need to know that if it will be for short time then i suggest to you to think before you buy any item.
refuguim will be better filtration then wet/dry filter you want to have a good skimmer to and alive sand not crush coral and live rock. some power head to creat good circulation of the water in the tank.
there is a lot information you will get here but i think if you will read this book you will get more understand on salt water and marine.
good luck