A quick web search shows it can cost upwards of $25,000.I'd say that if the flea-bag isn't a service dog now, it probably never will be.

The ability to effectively self manage would depend on the scale you are trying to buy. 

They don't ask for any documents just do a credit check and you fill out their application.

It varies a lot and depends on the vintage of the property and your tenant base. 

As someone who manages over 1,200 properties, I can tell you that proper screening is where professional property managers (PMs) really shine.Here’s why working with a professional PM is worth it:Screening Expertise:Fraud in tenant applications is more common than many realize.

Full disclosure, I only deal in LTR at the moment, but I know when I am not getting the quality applicants or volume that I want, I will lower the price by $50 to $100 per week to spur more applications. 

Quote from @Na Wilson: I have a source (depending on credit score) that can do a 90% LTV DSCR loan on non-owner occupied real estate. 

Taxes: Be aware of potential transfer or capital gains taxes, depending on your state.4.

Is it similar to Savannah / Tybee where new STR's can only be in certain zoning areas and there is a waitlist for applications?

And that number depends on you, your market, your property and your goals.