Some platforms, like Airbnb or VRBO, may handle the collection and remittance for you, but it's important to verify this.Make sure to register with the Florida Department of Revenue and Pinellas County to file and pay these taxes.

I looked at several different bookkeeping platforms and ended up choosing Baselane.

Many on here are familiar with the platform, as it's a great way to juice cash flow and the city looks much more favorably on it than AirBnB since Padsplit provides much needed affordable housing. 

Michael Plaks has created several great resources here on BP to educate about these, as does ReSure on its education platform (including some plagiarization of Michael's content!)

What short term rental platforms/sites have worked well for you that I should consider posting the property on?

Unlike most cities their regulations are enforced by the platforms.

What platforms do you folks recommend for listing a Single Family home in CA for long term rental? 

Still nothing really to show for the money spent so I reached back out to seomeetsrei for guidance and they suggested signing up on more social platforms and another 10K or so in backlink work...

Reach out to Airbnb, they have a platform for that and we used them and they find local photographers that do great work.

I'd probably try FB marketplace first and see how it goes, then if that doesn't help look for a good advertising platform like buildium (which is probably too robust of a tool for what you need right now, but something with just that advertising feature).