There are many people that want a goldfish as a pet. Most common reasons is because they think they don't have to invest much in a goldfish. That's not true at all, but it also isn't necessary true that you need to spend a lot of money on a goldfish.
With the proper care, and proper research before taking a goldfish as a pet, you don't have to spend much money on your goldfish at all.
Things to think about that will cost you are, the goldfish themselves which aren't expensive at all, the aquarium, heater, light, filter, food, plants and some accessories.
Most of these are just onetime expenses, like the light, heater, filter, aquarium. But the light, heater, filter needs to be maintained properly, and off course once in a while you need to change some parts.
One thing that you really need to keep out your mind is a goldfish in a bowl!!!
Goldfishes just can't live in a bowl.
First of all, a bowl is too small a goldfish can grow big.
Second, goldfishes are huge waste producers, and a bowl will become really dirty and really fast, and you can't put a filter in it to keep it clean.
Third, goldfishes need enough oxygen, bowls have a small surface an aquarium has a large surface which is essential to the health of your goldfish
Buying a goldfish, and beginning the care for a goldfish.
Goldfishes are living creatures, creatures that when not properly cared for can easily get some diseases and die very fast because of them.
The number one reason why many goldfishes die very fast when people start keeping them is lack of knowledge about how to care for goldfish.
The beginning of caring for a goldfish begins with research just like many things in live.
Before you even buying anything, you need to do research on goldfish. You can think about, how many fish do you want, what kind of goldfish since there are different kinds of goldfish, how big of an aquarium you want and where you want to place it.
If you do the research, and you know exactly what kind of fish you want, how many, and where you want your aquarium to be, you are ready to buy everything you need.
If you don't do all these things, you will let your goldfish catch diseases and they will eventually die.