If anybody has any experience with 203k loans and could help me in determining if these are fair terms I would appreciate it.

doesn't matter to anyone as long as the closing company has other documentation to explain what and why if they were ever audited, but thats on them to determine, not you to worry about.

Is there a website that provides updated location information such as population growth, average median home sales, rental capacity, etc.. like a one stop shop of data to analyze and determine what is a possible doable area to invest in?

Should I check to determine if they have tax liens; then send letters to the owners on record, indicating I would like to purchase? 

Your set of facts surrounding your property tax valuation will determine your success.

I'm determined to start building my circle, put in the work and bring value any way I can.If you're in Florida, mainly around the cities mentioned above, I would love to get in contact with you and just chat! 

Figure your costs, then figure put what the market will pay, and determine if the profit margin is worth pursuing.

Your "If's" are presumptuous so unless you have actually determined that they will take a price that actually makes it a good deal, you have nothing here.

So, talk to the zoning and building department to determine the building codes and zoning codes that will apply to your project. 

You've already determined the answer you want.