You shouldn't deal drugs.
Trevor is struggling with his finances lately and has overdue bills.
Trevor wants to make more money.
Trevor gets a job with his local parks and recreation department doing maintenance at the parks and makes decent money.
Trevor invests in a large amount of drugs which divvies up and sells to people in the local community for profit.
Trevor's community is able to live healthier as the parks are well maintained and safe.
Trevor's community suffers as the result of his drug dealings and people get hooked on drugs.