Every system you try will have flaws, or you may salivate over a feature that appears in other software.Some familiar names are mentioned frequently: Stessa, Apartments.com, RentRedi, TenantCloud, Innago, RentManager, Avail, Rentec Direct, Doorloop, etc.I recommend conducting thorough research on each app online to understand their offerings, pricing, etc.

I'd say the quality of leads vs other online sources has been and still is pretty good. 

Or maybe the ESA letter is from a bogus online source that isn’t acceptable.

Unfortunately, it doesn't look like that county provides that information for free online, BUT they do upload it to a private company that will sell you access to it online for a fee:https://www.courthouseonline.com/

In order to get the attention you want through online ads (which last I checked Facebook ads require such a wide range for the demographic that it is almost not worth it), you would likely need to spend literally thousands of dollars. 

And once you complete your 1031 exchange you could then do a cash out refi on one of the properties to access the cash you need, and fully take advantage of all the benefits of the 1031 exchange.You just want to be mindful of the time frame requirements in this scenario, but as long as you are proactive it shouldn't be an issue.

Create an Online Presence: Build a strong presence on Facebook, Instagram, and a credible, professional website.

It should be on line, look it up.

In some cases the boat slip alone because they offer Gulf access can be rented for $500 to $1000 a month.  

@Helene GoodworthTo expand your network, identify your areas of interest, highlight your construction skills' application to investment projects, actively participate in local and online groups, and seek mentorship and guidance from experienced investors.