Here's what I think may be the catch; the properties are in my name already and as I understand, they must be put into a LLC or some type of entity that holds them until the sale is complete.Am I out of luck this time?

If you have an LLC established with business checking you could open up a line of business credit or use business credit cards (for 0% APR the first year) to fund a lot if not all of the renovations and then use the cash flow and a cash out refi to pay them off.I've never done this though, I am really interested in learning more about leveraging business credit though and believe from my research this could be viable.

Should I put them under an LLC? 

Are there any lenders with 30 yr fixed loans for prop in LLC?

The duplex was recently transferred to an LLC that my wife and I set up. 

I know the rental company LLC must bring in some good money, and the landlord has money himself (drives a nice car, etc.), but not sure how wealthy he is. 

HI everyone – we are thinking of reclassing our “vacation property” that we have done short term rentals out of for the last year, to be owned under an LLC.

@Jonathan M Bojan You'll want to use an LLC for your strategy.

Is it worth it to stand up a LLC and move a paid off rental property into it?

In their own name or an LLC?