Other than any fees to join a broker which most do not charge you have a lot of extra expenses.
NAR dues and joining fee
State Board dues and joining fee
Local Board dues and joining fee
Mls dues and monthly fee
Electronic LockBox registration and monthly fee
There are a lot of extra costs involved in start up like signs, cards, advertising,
Most new agents feel lucky if they make 5-6K the first year after startup costs.