Unfortunately, you've asked an impossible question. What's hard for one is easy for another. Tank size? Whatever you want. I lean toward the bigger the better myself. Anyway, salt tanks. Generally speaking
, a salt tank really isn't a whole lot different then a FW
tank. Ya buy it, ya fill it, ya put the fish in.
Tank temps are kept lower. 72-73 degrees on average. You'll have to keep track of the salt levels in the water but that's easy enough. And the salt gets everywhere so you'll be wiping things down on a regular basis. Ummm, other then that, pretty much the same 'ole.