A lot f people say that it's ok. The Goldfish are Fancies, so they get, at max, 10". I heard you need 20 gallons for the first Goldfish and 10 for every other Goldfish you add. So I will have enough space for the Goldfish. Besides, I can keep up with the cleaning.
Sounds cool! I'm sure you'll make a beautiful tank. You may want to consider a fantail goldfish instead, though. They are, IMO, the most beautiful goldfish type, plus only grow to 6 inches rather than ten. They come in different colors too
They also tend to be healthier, as they don't have the digestive dead spots Ryukin do
Yep. I will, plus I plan to over filter the tank. I'm getting a filter for a 50 gallon tank and I'm doing (like all my tanks) 2 water changes every week. I think that my fish are happy from it. I do around 25% every time I change the water, and I do it at the begining and end of every week.