Figs are a great idea and a favorite of many tropical herbivores. Unfortunately where I live, figs are only found deep in the jungle and are not available at the markets. During the period of deforestation in Thailand, many of the fig trees were cut down. There is still some illegal logging, but they are making a great effort to restore the forests and jungles.
Living in a tropical environment has its plusses and minuses. Many more plusses, like we can keep them outside all year and they just thrive in tropical conditions. You also made the point about having fruit and vegetables available throughout the year; there is always a great variety and they are always fresh. The bad side is that many of the items listed in iguana literature does not grow well in the tropics; it is written for people living in the US and Europe. I had to do a tremendous amount of research to find nutritional information on the tropical fruits and vegetables available to me and make a determination whether they were good for them or not: calcium: phosphorous ratios, proteins, vitamins, minerals, etc.
Do you grow dandelion yourself? I had to make a dandelion garden, but they do not do well in the high temperatures and humidity, like they do in the US. I can only produce enough for my hatchling tortoises, who have a greater need for them.
I used to prepare salads every day, but I do not prepare every day anymore. I make a large salad of leafy greens, which I store in plastic containers with paper towels in the refrigerator. I add the okra, peas, and fruit every day to the final salad that they are given so that the salad does not spoil. It took me about 1.5 hours to prepare my tortoise and iguana salads every morning when I prepared it every day; it still takes me about a half an hour every day, even with all the prior preparation.
Michael