Not sure where to post a provider ad ???

The top row of tabs is: [MyTER] [Reviews] ...
The 2nd row of tabs is: [TER General Boards] [Regional Boards] [Buzz Boards] ...
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Go to Buzz Boards and look for the city or cities that are closest to where you plan to be and want to buzz about your availability. Read through a bunch of posts to get the gist of what is allowed or looks more effective in those areas, etc.. Some Buzz boards have more activity than others and some are dead as a door nail. (Check the dates on the most recent posts.)  
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ALSO check the Regional Boards for your areas and read for a couple of days to get "feel" for that board and some of the more frequent posters (who is helpful; who is a bully; etc.). Post to the Regional Board to ask for more local advice in your area. It looks like you might be FL based but I don't know FL. My example would be: (a) if you are based in Hartford, CT you can ask on the NYS, Boston, and New England discussion boards, "I'm based in Hartford, CT. Where should I post my photos and availabilty?" or something like that.  If the Buzz board for your areas don't have much activity, you can ask on the Discussion Board, "What sites do most people use (to search or to advertise) in this area?"
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Photos are only allowed on the Buzz Boards and the Photo Only Board. Read the rules about posting. E.g., Photo Only has a photo ONLY and no text in the body of the post. The subject line is typically Name + Cities + Dates only.  Read and follow for a few days to get an idea of how people are posting there.  
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If you have more Qs about the rules, etc., post again to Newbie.