As others have said…it would be tough, especially if you had an emergency.
But to make your dollars go further, buy a national parks pass for $80. It’s waves entrance fees into national parks, which add up quickly. Yosemite and Yellowstone are both $40, for example, so after two parks it pays for itself.
Also, I’ve traveled across the U.S. half a dozen times and always try to camp in free spots. This website is a user entered database where you can find free camp spots near you (ranging from gas stations to beautiful hidden oases - so read the reviews!). The US isn’t like some countries where you have the “right to roam”. We can really only camp in certain areas, and this site will help you find spots.
It is possible, in very specific circumstances. It helps to be an expert in your field, especially more so if it’s in a highly technical international field.
I have a friend (dual US/French citizen) who earns around $200k USD in Paris working for a private American company in aerospace. He has a very specific skill set and was able to negotiate a “low” American salary in exchange for living in France. The company wants more connections with ESA, he gets to live in France with an insanely high salary (by French standards), they get to pay him less than they would an American (their base pay is around $300k)…everybody wins.
You can also consult - but have to be driven.
You can also work for a company that is remote and just not tell them you’re abroad, or work for an international company. My company (international conservation) allows for remote work as we have offices all over the world, so if you want to go anywhere for 3 months of the year and travel we are able to. More than three months though you need to be a “resident” in that country and claim it. I have a colleague I suspect is working illegally in France, but should be in Germany. Who knows how many others are doing it in my company…