A financial advisor can help you  create a comprehensive financial plan to make sure you cover all your bases before you move forward. 

When you find out the present zoning of the property, the future land use and the local agencies comprehensive plan for how they see the area being developed (all can be done at the local planning office) you will have a much better idea of what you have just bought.If the land could in any way be developed into something more than single family residential lots, i.e. if there is any multi-family or commercial component than I would advise you to hire someone qualified to help you with the site planning of the development.

Marketing and Advertising: A property manager has the resources and knowledge to effectively market and advertise rental properties, attracting prospective tenants and reducing vacancy periods.In summary, hiring a property manager can streamline operations, enhance profitability, and provide peace of mind for you, allowing you to enjoy your investments rather than being bogged down by day-to-day management tasks.A property manager will give you more time to expand your investment portfolio. 

Your question in (1), my simplest answer is this is why you're not ready to be a Managing Broker, your lack of knowledge, insight and comprehension in this regard. 

Not all are comprehensive or even right, it is buyer beware.

Instead of extensive renovations, we focused on strategic market positioning to enhance the property's appeal.

This is an excellent platform for networking and enhancing your knowledge.

Positioned near land we own on West Concord Street, which is slated for a major development of 12 patio homes and two duplexes, this property is central to a broader strategy of enhancing value and transforming the area.

They all have the same basic features and you don't need any of these crazy enhancements.

Specifically, you should do a deal only because the (complete, comprehensive, accurate) numbers tell you to do so, not because the calendar tells you to.