Answers to some of your questions ...
directly behind her is a electrical post on a tree. She uses a standard 12' extension cord.
It frequently rains in Jamaica. All of the vendors (of which Inda is only one) carry large tarps with them and they cover the whole area with a tarp during the rain. The rains usually don't last long. The week I was there we only had 1 afternoon rain.
Yes Inda sells the upside down dolls and if I was still there I would have offered to get one for you. I'm at the office now, but I believe I have a photo of the doll I purchased from her 4 years ago (and subsequently sent to my grand-daughter in England). I'll try to find the photo and post it.