Early Days
Since he was young, Evan had a strange personality and obsession with plants. This put off his peers and consequentially left him without friends. He was a clever, quick-tongued kid and talked himself into problems with his boastful and self-assured facade, while on the inside he was lonely, bitter, and hurting.
When he found out that he could grow plants in half the time it usually takes, he began to sell out of his garden and caught the attention of passing Werewolf Hunters. Seeing how desperate they were for wolfsbane and mistletoe, Evan smugly jacked up his prices. To his surprise, they took the deal and he got his first taste of scamming and earning money through it.
It took no time at all to figure out that what he was selling was illegal, but he decided that breaking the law in favor of getting rich and doing what he loved was a very small price to pay. He regularly started to sell his products to people all over the country, and his cockiness exponentially grew.
Present Day
As an adult, Evan is a well known name in the Supernatural and Hunter household. He's famous in packs/clans and well respected; if a bit feared or hated.
Now incredibly well off and having his own home, Evan gives a good portion of his money to charity or anonymously donating to people in need around town. He makes sure all of his charity work is done without his name attached, not wanting anyone to know he had this empathetic side to him.