For $400 you can buy a new Xiegu G90 which is a 20 watt HF radio (HF provides up to worldwide propagation by reflecting off the ionosphere) and for $1000 you can guy any of several popular 100 watt radios that will do so more of the time because higher power means a greater chance of being heard. This is an oversimplification just to bracket the cost for you. An antenna is required and can be as inexpensive as $20-50 if you make it yourself using materials from the hardware store. But more importantly is you need to have a license, which means studying for an exam, and that in itself is important because ham radio is not like making a phone call. It’s more like fishing where your results are proportional to your knowledge.
But it is a mode of communication that can be done from anywhere, using battery or emergency power if needed, with no infrastructure. Your radio, a wire strung in a tree, and a power source is what you need, in addition to the knowledge of how to use it.
I got a Mobile Yaesu unit,,,50 WATTS!
Getting a stand Alone
Battery..
WA5VJB has great antennas (made in America) and a lot of free plans for building your own antennas.