The course heavily relies on cold calling and emailing, which hasn't been effective for me as a novice.I'm considering a different approach, such as arbitrage, as it seems more accessible for a beginner.

You should not have allowed access and now you are going to live the old adage of "it's easier to give slack later than to real it in." 

If the residence is inside a gated subdivision or a controlled-access buildingthat is governed by an owner’s association, a letter from the association acknowledging the use and grantingaccess to occupants of the rental unit will be required as part of the application.A short-term residential rental requires a Conditional Use Verification (CUV).A short-term rental use is unavailable and prohibited within a residential unit or a room within a residentialunit that is located in an apartment building.

However, in the event of an emergency, the Landlord and/or his agent has unrestricted access to the property.

Real- Estate  is a lot tougher game now because of technology now allowing buyers, sellers to access the market using the internet without using agents but  you do have hot areas that can support  more bodies .

Also where can I access your extension?

Has your agent accessed the PCR within Hudhomestore to see if activating all utilities is even possible? 

A renovation company that has already completed over 350 renovations for us will quickly do whatever touchups/repairs are necessary so we can get the property back on the market.Use electronics to control access and reduce turnover time.

I always suspected that to achieve anything of great notoriety in Architecture one needed to have access to wealthy friends or develop projects oneself.

Partnering with others can reduce risk and access better deals.