Why does it have to be one or the other? If your open to opportunities they will appear. One of the biggest Ah Ha's I learned in this is industry is diversify your income streams.
Property Management - Reoccurring income - Less upside but dependable income typically. Works well in a down economy. Takes time to build.
(Also note a job is reoccurring income as well - steady and reliable but less upside)
Wholesaling / RE Commissions - Small Capital Income - More variable income bigger checks then property management but more swings month to month.
Flips - Large Capital Income - Much bigger checks, capital intensive, bigger risk longer time frame fewer checks but big checks when you get them.
Notes / Rentals - Passive Income - We all know what this is.
Focus on what income stream is generated by an activity not so much what that activity is then figure out how to combine them to most efficiently reach your goals while providing a safety net if things turn south. If you mix your knowledge, expertise, and add more tools to your tool kit then longer term you are in a much stronger position for the ups and downs.
Also, a note on the agent end. The best agent isn't the one who knows every house, street, etc,
The best agent is the best marketer. The top 20% of agents who actually make money know how to market and generate leads, prospects, and turn them into listings or committed buyers. Time is best spent on those areas to be successful as an agent. By default if you do that and you generate business you are going to gain the market knowledge from experience of doing.