The bank that owns the loan will not talk to me since the loan is in someone else’s name (the seller my grandfather did the deal with) despite me being listed on the deed. 

I think it's important to note the Orlando STR market is vast.

I've completed a few successful renovations, own two properties, and I'm also looking to scale my portfolio.

The value of individual agents within this framework covers the spectrum from the relatively incompetent newcomer doing this as a partime hobby to the vastly experienced professional with a knack for negotiation and an ability to find a market for hard to sell properties. 

if you’ve owned the property more than 1 year you will owe ABOUT 15% tax on your selling price, minus selling costs, minus purchase price.

So much of learning development is understanding the specifics within your own market.

That has its own appeal to me. 

I own a building with another LLC as Tenants in Common.

I have also knocked on a lot of doors of houses next to a property I'm interested in to find out who owns it and any other details about the property.

Special bonus if it's a landline number.I have my eye on 25 units in duplexes, quads and a 7-plex (my favorite size) owned personally (not in entities) by 5 different people now all over the age of 70.