Desirable houses that I have seen are starting at 650k, but I was wondering if there are other sources to look instead of online postings. 

The second item and this is more a concern I wanted to raise is your objective of reaching 100 doors in the next 3-4 years.

Facebook and all these online or social media based groups can only get you so far.

Go to Etsy and search for "rental property tracker," and you will find hundreds of nice spreadsheets to track 10-20 rentals, usually for under $10.Software has extremely helpful features like online payments, marketing syndication (click a button, and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

. :-)Sometimes being objective and completely truthful isn't the best approach lol 

In terms of the lady spending all her time reporting violations... yikes.There are a few maps online that show the unincorporated areas of pinellas county down to the street, and then you can cross reference the county zoning website.

Get to know people, build relationships, and determine if they are the real deal or a pretender.Asking for investing advice from strangers can be a lot like online dating: 

Mentors are found by building relationships at meetups in real life, not online when you are just getting started unless you are using the forums as your meetup and you are really getting to know people.4.

These "bandit" signs are everywhere in NYC and I have yet to ever come across someone who has called them to actually sell their property - most people I know have looked up something online and landed on an option through that route. 

Recommend Googling for recent projects, then looking them up at the city's online site to find out who the architects are.