Head - $500 - 800
Gloves - $200 - 300
Tail - $100
Legs - $400 - 500
Full body - $1000 - 1500
The approximate cost of the parts of the suit. It depends on the fame of the master, his experience and the complexity of the costume itself.
A well-known master will probably sew a realistic fursuit for a lot of money, up to 5k, perhaps.
My opinion is that this is the thing for which a miser pays twice. The costume must be made of high quality. It is cheaper to buy it in parts.
Many craftsmen also make Suits or head + gloves of neutral color for myself. You can consider a ready-made fursuit. It will be cheaper and you will just need to repaint the fur, for example. The master can do this for an additional fee - it's cheaper. There are sites where you can buy a used suit, usually they require repairs, but this is also a good option.
I would also not advise buying fursuit for underage fur, firstly, it is very expensive for them, and secondly, a teenager can grow out of it in a couple of years. It's not rational.
Save money while you are still very young.