Pictures work wonders and numerous studies have shown that pro photography pays for itself many times over.4.

It's just not yet widespread.The case study of hotels "hotels making a nice spiff on guests when using a hotel phone" is a fine case study.  

Quote from @Jamie Hora: The question you pose in the title, "Is a rezone required if availability study can support more density". 

You might want to join groups or forums specifically for private lenders—BiggerPockets is obviously a great place, but local REI meetups or masterminds could also help.Also, consider sharing insights or case studies from deals you've done (if you're comfortable) to spark conversations.

@Harsh PoshtiThis will be dependent on the area and I would recommend you perform a market study to determine which project would yield better results and if either is even viable.

Purchase Another Investment Property and Utilize a Cost Segregation Study:When you reinvest in a new investment property, you can perform a cost segregation study to accelerate depreciation.

A recent study showed that 80 people are moving to this city every single week, which will continue to increase housing demand.

Night Before the Exam dot com is a good state study test if they have it for your state.To be clear though, the majority of what you learn in the class is not used by residential real estate agents in practice.

It would help if you studied how your home compares to others and ensured it is priced right.

Quote from @Melanie Baldridge: A question that we get:"Does the IRS require site visits for cost segregation studies?"