How can i make money no matter where i live?

i plan on becoming a van dweller here soon so i can travel the country. my only problem is since i don't have much in the way of savings is how do i make money while traveling? it has to be legal and something i can do in the boondocks or in a city. i am a 22 year old male with a high school diploma. the way i see it i'd like to make around $800 to $1000 a month at least but i can make do on $600. a month.