I've asked my mom if I can get an Oranda for her house . I was wondering if it would be alright to start off with a tank that's around 2-3 gallons - I found a tank kit around that size - , I understand that they need a bigger tank as they get older , but would a 2-3 gallon tank be alright to start him out ? Further more , how long could it live in one that size before it needed to be moved up ?
I've had fish before , so I'm aware of how to care for one ( I had two common goldfish that lived to be ten years old , plus two different bettas that each lived to be around a year each ) . So if you know the answer to my questions , thanks ! P.S. , I'm trying to keep the pricing under $ 100 , so if I need a larger tank , what would be a good price ?

20 gallons is the bare minimum for a single goldfish, I would suggest getting at least a 30 gallon for a single fish. I would check out craigslist, a dollar per gallon is usually a pretty good deal. Fish keeping isn't a cheap hobby, I suggest you save up some more and do things right the first time. Do your research and make sure all your questions are answered a head of time.