Zillow is not a reliable source for their estimate nor the sale prices they list for recently sold properties.

Can anyone give me some other reliable turnkey companies around the country?

This industry is full of colourful, but not always reliable players, Craig and Curt are a safe pair of hands.

*Not all tenants* - I just know a few who are financially qualified, had been reliable, but just suddenly hit a financial roadblock this month.

If you the money was inherited or won in a lottery, then I would say you should sock it away, find a reliable financial advisor, and follow their advice.The fact you are salivating over a vacation rental that earns $10,000 a month indicates you're not financially savvy and should find an advisor quickly.

I my opinion these are the most reliable way to grow as an agent that I plan on using. 

Not bagging on the small business out here but you need a company that is reliable and will show up EVERY time and deliver CONSISTENT service.2.)

To get specific neighborhood info is more difficult and may require you to contact agents, PMs, local investors to get reliable detailed information. https://www.biggerpockets.com/forums/850/topics/895660-my-first-investment-property-an-out-of-state-dealBest Wishes!

I am interested in investing in a coin or card operated laundry but have some very basic questions:- What are the reliable resources to find available businesses?

Turnkey purchase should be easy, enter in a contract, have it inspected (anticipate minor issues, not major ones like I mentioned in my OP), rectify those minor issues, have it appraised (negotiate if appraised value is lower than sell price), close and move-on.On to another provider, I am hopeful of finding a reliable provider soon.