My personal opinion is if a person is open to buying land anywhere in the entire world to grow tropical fruit trees, and is from Bali, anywhere in the contiguous US would be a terrible idea. Nothing at all about FL or CA screams "tropical." There are a million properties to choose from in SE Asia, in Central Africa, in the Caribbean and Central America, that already have a bunch of fruit trees on them - and would tend to be cheaper than the US to boot. Why in the world would anybody choose a place that has lower than rainforest level rainfall, and freezes? That just seems obvious... If I could go anywhere to make fruit a priority, I sure as hell wouldn't choose to be here. I mean, Thailand, Borneo, Malaysia, parts of India, Brazil, Costa Rica... all would obviously be a million times better for growing fruit.
I have seen a number of properties on Puerto Rican real estate sites that fit what you're looking for, Dominica, etc. But it depends in each place what culture you will feel comfortable with, what the laws are for foreign land purchase (for instance Haiti doesn't really allow it, Dominican Republic does, Jamaica does but it can get complicated), what the local crime/political situation is and whether or not you will be subject to constant stealing of fruit from other locals if property rights are considered more communal than really private. In many places, theft from monkeys will also be a constant issue!
I would suggest you come up with a list of top 5 or top 10 countries you'd like to move to (top 3 would be way better, if you can be decisive) and then start looking into the process for property purchase in each. Don't go where the fruit is necessarily, because there is fruit everywhere. Go where you can get the right kind of lifestyle for you, where you don't have to worry about constant natural disaster wiping out your work, where there is ample rainfall and good soil (but hopefully not mudslides!). Pick a place where you will be allowed to ship seeds and plants in from other countries. If you can afford it, pick a place that already has a road and adequate access built, and working electricity and running water if you will require those things. Make sure if you have any construction to do that it is somewhere you can hire local people easily and affordably who will actually show up with the proper equipment inside a few months and not leave you waiting for a year or more on their backlog. Some of the best places in the world for growing fruit are also places with unstable political climates, high violent crime, and very poor infrastructure so it's hard to get anything done or be sure that you will still own that land when it finally bears fruit. It can be hard to find a place with a good balance of the necessities.
Write out your priorities in choosing land, so it will be easier to narrow it down. If all you want is land that is already growing tropical fruit on it, that is in plentiful supply in any one of probably 50 countries. But prices, and your enjoyment in each, will vary. Please keep us updated on your search - it sounds fun!
[If it were me, I'd probably pick Brazil, or Thailand (or maybe Vietnam?), because they both have access to a wide variety of rare fruit, seem to be relatively good about shipping things in if you need and have active markets with great fruit trade if you don't, but also have some infrastructure and major cities accessible should you need to be closer to human culture at times. I also happen to really like those cultures. But that's me...]