I lived overseas while working for US companies. I met nomads making $20/hr and others charging $150-$300 per hour. A few with specialized skills claimed to charge even more than that.
If you have a full-time job that allows you to live anywhere you should make whatever you make now. If you freelance you charge based on the value of your work to the customer, which has nothing to do with your location.
I have articles about freelancing and nomading, including finding customers, on my site typicalprogrammer.com. Free, no pop-ups,ads, or affiliate links.
Then a friend of mine heard I had done a good job and asked whether I wanted to join him on other things, then I was set.
If your clients are happy they will offer more jobs, recommend you, opportunities will arrive.
I haven't had the need to look for a client ever since