I'd get the data from city-data.com.

Maybe another outlet to checkout for solid data :) One additional thought I had is around income.

Some other potentially helpful context data points:  when we first moved in, there was a German cockroach infestation behind/under the fridge.   

@May Emery it sounds like that FSS list is derived from credit data.

Bank loans, bank accounts, brokerage accounts, IRAs, 401ks, car loans, insurance companies, cruise ships, credit cards, ez pass, doctors and hospitals, drivers licenses, colleges, high schools, not to forget gun shops, google, ATT, Verizon, Comcast, Amazon, airlines, CIA, IRS, FBI, TSA, Homeland security, Target and Home Depot data breaches, security clearances, car dealerships, title companies, accountant, employers, landlords, credit bureaus, payroll companies, golf and tennis clubs, business clubs, volunteers at schools/churches, Russians and Chinese, etc. it’s more of a question as to who doesn’t have it as I see it.

AirDNA and All the rooms are on-line data collection companies that also follow residential hospitality trends.Demand - Depends :)  I always like to talk about "Portfolio Diversification." 

All the Rooms and Airdna offer rate data and trends and for longer stays there are a number of different corporate housing reports.

I’m exploring options and trying to learn ?

You can do some prelim exploration by searching different towns/areas on wikipedia & Zillow to get a sense of what towns have the price range & type of inventory you're looking for.

You could be local and yet become ill, etc.If some investors want to overpay, it will become noise in the data.