Do you think your property will have access to the ocean or other productive body of water? If so, this would significantly simplify protein production. Fishing also has the benefit of bringing nutrients back onto the property to replace those lost through leaching, etc.
Your choice of a warm location solves a lot of challenges faced by us in colder climates. Winter heat, winter animal feed, large amounts of preserving, frozen pipes, etc. all take a lot of time and energy to manage and often have us looking for higher tech solutions. I’ve spent some time south of the border and things do seem quite a bit simpler.
Have you spent much time in Panama or a similar area? If not, I think you will find simple, appropriate technology, for solving many issues with some local recon. Look for projects conducted by NGO’s such as Heifer, Oxfam, etc. They have a tremendous amount of experience with resilient methods and solutions.
As it is, I do my best to abstain from anything with a circuit board. The aforementioned fence charger and the device I am typing on are the two I use the most. My very limited power equipment (garden tractor, chainsaw, weedeater, push mower, water pump) are all gasoline powered. I’ve flirted with the idea of an electric chainsaw, mainly for noise reduction, but I am not impressed with the battery lifespan (not operating time) reports I see. 2 strokes seem to be shorter lived, but a little bit of maintenance can keep a 4 stroke running for 20 years plus.
My advise is to design your property with heavy constraints on tech, make it work without, then add a bit here and there, based on proven robust designs.
Experimentation is great, I’m glad there are people who love to experiment with tech, but robust resilience in design is usually something that comes late in the game, sometimes at the cost of complexity and resources.
Keep it simple. The faster you can bring someone new up to speed on your system, the more sustainable it will be.