I would recommend before taking on any project, saving 12 months reserves, 20% down and learn the business by being active in it. 

Lots of activity here. 

Agents may also have macro data on historical data, local median sale prices, absorption rate, etc to help with your analyses and projections.Networking/build a team: Attend local meetups, virtual meetups and stay active on forums like this.A lot of this will be done in front of a PC unfortunately but if you cut out the noise, you'll be able to maximize your time.Lastly, something that has helped me tremendously with respect to focus and improving efficiency is the pommodor technique. 

I know cities like Baltimore scare a lot of investors but I've seen a lot of activity lately as if folks have finally decided it's time to act.

You can self-promote under the Classifieds forum.Regarding cash buyers list you are trying to create - just find solid deals and publish them and the buyers will appear.

At the time of purchase, there were several STR rental properties active in the neighborhood.

You can check their insurance coverage, any active lawsuits they have, their workers comp rate (how safe they are on the job site), and other metrics.

Requiring a real estate license can potentially be a “trap” for wholesaling, as real estate licensees may in in violation of their code of conduct by way of their wholesaling activities.  

Ref:  Active Energy Account?

BNBCalc partners with several data providers for short-term rental revenue estimates (Airdna), comparable properties (Airbtics), long-term rentals, tax information, and property information.Our comparable properties provider airbtics provides "revenue potential" estimates which it defines and calculates as the following:Revenue Potential is the revenue that the listing could have earned if it was active every day for the past 12 months.Formula:Revenue Potential: = (Revenue / Days available) * 365 Example: ($33,500 / 304)*365 = $40,222You can find more info about their data on their FAQ!