You can also search for local FB groups that specialize in longer term stays.

Quote from @Kyle Carter: The comps that come from local real estate agents will be the best for this one.

If you're not having any luck with mortgage brokers (I'd search out the ones who specialize in investments), then go to your local REI meeting. 

Go to BUILD YOUR TEAM at the top of the screen and look for local investors or meetups in your area.

It’s a great way to meet local demand while creating steady cash flow.

While this is a cool area with natural springs that does draw in people, most people are local to FL and there is a lot of camping. 

That said, be sure to check your local jurisdiction for other regulations.

I saw an example recently in Bloomberg about how local regulations can really shape a landlord’s experience, from what I’ve heard.

You'll learn what contractors are good at such repairs, and eventually people will start bringing you "problem properties" with that issue.Another related idea: contact a good local realtor and ask them if they know of any on or off market properties that would be a hard sell for most buyers. 

Could you have the house rewired and plumbed by the world's slowest plumber and electrician?