Trying to do it all at once is mostly a killer. That's not to say you can't do maintenance and smaller tasks while actually traveling, but really building anything meaningful actually requires a lot more concentration in my opinion.
If you've got a job to do, do it. Don't go wandering around exploring the city for half the day, or lie on the beach chatting with backpackers. No. Sit at your desk and do your job.
Once you've done your work, in your properly setup work environment, then go explore your new and exciting surroundings.
Then get to bed on time, and work a proper day the next day.
Whenever I see people in hostels, lazing back on couches, tapping away on a laptop and saying they're a digital nomad, what I see is someone who's not serious. They won't last.
I kinda suspect you're looking on the wrong continent or as you say you're just not suited to it.
I found a nice (enough) apartment for 120$/month that is extremely close to the largest market in PP and Olympic stadium, where I exercise daily. Right outside my front door I can find excellent meals cooked by my friendly neighbors for less than a dollar. I'm here for at least a year, but probably longer; I love this place.