I just played through Heart of Stone, about to start Blood & Wine.
My god, the enchanting quest takes a lot of coin to finish (30,000 if I am correct). I'm on the third and final stage of the quest - paying the 15,000. Is it worth it? That's a lot of coin, I feel like I'll be finished Blood & Wine by the time I have saved up that much.
I remember being disappointed after I spent all my money on him but I know others (who probably understand the enchanting buffs better) would disagree. I spent the whole game saving, basically (it's how I play all RPGs...) and, after him, I had like 11k left. Then I wanted mastercrafted cat gear and had to grind for money again.
If you're really curious, there are some guides & reddit threads where you can see what you get for the price. If youre rich? Do it without question. If I remember correctly, the catschool gear enchantment didn't fit my play style, which drove my disappointment.
Money is incredible hard to make, they really blew pricing in this game, even big quests pay 50 or 100 coins and meanwhile a single rare crafting material can cost 2500 coins.
Any ways to make money in this game like banking or opening up a shop or something I'm not thinking of?
Loot everything & every monster you kill. Sell everything you can spare at every vendor you come across (except crafting materials; I make a rule that anything over 15 monster-loot wise, I sell). It's a slog but if you start it early, it pays off (currently doing that on my second playthrough so the enchanting guy above doesn't feel as bad this time haha).
If you're on PC and don't mind a "minor" cheat, there are mods for rich merchants which gives them all like 5k so it's easier to dump everything at 1 person when you're a higher level and the loot is worth more.
Edit: Love that this thread is still active 3 years later.