1 ft 1 fish? Thats will be great in term of space and bioload but I doubt anyone can resist the temptation of placing in more beautiful fish.
For me i feel, 3-5 fishes per ft? Depending on the size and the fish bioload, small tank I feel shouldn't have too many bomber like Tang. Nitrate might get too high, unless the reefer is super hard working to do water change everyday more fish I guess wouldn't be an issue.
7 times flow of the tank capacity per hr is good, ensure that tank is well cycled.
Just my 2 cents worth.