This is actually LESS transparent for buyer's and investors as they don't know what they are competing against or if the listed price includes offers of compensation to the buyer's broker at all.

Does anyone have any actual data on the return on this component (previous appraisals, paired sales analysis, comparison on new construction with/without rooftop decks)? 

The answer depends on how you use the money. 

Is it the base fees, or is it the actual use?

You’d be shocked by how little actual screening many PMC’s do!

Customer service needs to be from people that can actually help resolve a situation, not frustrate the guest to the point that they simply hang up.  

Also, in terms of flooring for the storefront what material would be best in terms of money and quality? 

It needs a lot of time and money and skilled work Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

@Nia BookerReal estate investors can use various funding options, such as Other People's Money (OPM), hard money loans, seller financing, business credit leveraging, and borrowing against a 401k.

If I was first starting out with $100K, I would spend some money on marketing to get deals direct to seller to get better deals.