Curious if anyone here:*Has experience with flipping land lots and has any general or specific advice for me?

Holds up to abuse, isn't particularly taste-specific, and is affordable/readily available.

What should I check to confirm if I can legally register the Airbnb under my LLC for rental properties as a different series? 

In most places, like Benjamin already mentioned, STRs and MTRs have different legal requirements and considerations.

., certify mail to last known address, meeting the specificity requirement on the notice of claim, mailing within the timeframe provided by statute. 

You can find this estimator on the Hillsborough County Property Appraiser's website or the Tax Collector's site.If you have any specific property in mind, just plug the details into the estimator, and it will give you a clear breakdown of all the taxes involved.

Security deposit amountYou can find plenty of examples by searching for "tenant estoppel certificate doc" or exchanging "doc" with "pdf" for more options.Here is an example and explanation: Sample EstoppelSome have a lot of legal jargon but this document does not need to be so detailed.

Can’t comment on the this market specifically, but make sure to ask others who are more experienced WHEN they invested your area.

Unfortunately, I am not a broker so I can’t legally do that in MN.  

Second home loans, specifically vacation home loans, are available with as low as 10% down.