If you are behind on your MF payments, then you can't give it away or sell it. As Fried Shrimp suggested above, try the Transitions program although I believe they will only accept deed backs in this program for owners who bought from the developer.
If the Transtions program turns you down then you have a couple of other options. First keep in mind that most Central FL TSs like yours are probably worth zero dollars resale, so please eliminate any fantasies about selling for thousands of dollars. In fact, in many cases like yours, owners are offering incentives to new takers of their TSs such as paying the next MF. If you can afford to pay the past MF (although you said you can't afford it at this time), I would suggest paying it so that there are no road blocks to giving it away.
If you can't afford it, then your best option, unpalatable as it may seem, is to stop all payments and let it go into foreclosure. You may face a hit on your credit score and a bunch of collection calls and letters.
The biggest thing that most here on TUG advise against is using these law firms or companies (they usually have comforting-sounding words in their title such as exit/cancel/relief) to get you out of your predicament. They charge large upfront fees and are usually scams. And they do not have any magical powers to do things that you can't do yourself.
