If he wanted to make an endless amount of money, he'd need sufficient business capital. The equipment business with Qian Sanduo was decent, but the market for equipment could ultimately never compare to elixirs.
After all, elixirs were consumables, so it was almost impossible for the market to become saturated, unless a better product appeared.
Equipment, on the other hand, was different. Any Mage with a bit of strength would choose to gather their own materials and forge their own equipment. Especially after the fifth rank, very few people would buy standard equipment.
The reason the Wind Clothing Store was so popular wasn't due to the quality of its equipment, but because of the cool designs Feng Hao provided.
In short, for Mages, standard equipment was basically everyday wear. The market and profits were limited.
