I was thinking of trying to save money in the more extreme way.

Sleeping on a soft mat only instead of a bed is okay or most people
If your hair are short you can probably stop buying shampoo, conditioner etc.
Not being ashamed of picking up clothes from the trash, after a good wash they're perfectly fine, just don't tell people where you've got them maybe.
Dishes can very well be used for lunch-dinner or dinner-breakfast to wash them less often.
No idea of how you could go lower than 3$ a day for food, i'd assume you already drink tap water and that's good.
Entertainment is your brother's needs vs yours, if you're a true rock just go the public library or a park and chill there.
Lights on less, heaters low, water faucets not to the max, short showers and never ever use the bathtub.

You're probably already doing most of these things but eh, just in case

>>18654209
Long hair but i'm trying to use less soap and shorter showers.
Trying to eliminate my use of heat even at winter.
the only light i use almost is the light from my computer.
But yeah most of these i do.
Got enough clothes to last for now or at least Christmas so i might get new clothes as gifts.

Only high spending thing i do is use my computer a lot. but i want to be able to do that at least. Not that desperate to save money.

Eat your own cum and drink your own piss. Lots of money saved on the gym and food

>>18654228
I wouldn't worry about that, if you're not buying other stuff then the power needed to run your computer is most likely worth less than 30 cents a day.
One more thing i can think of, check your internet and mobile offers to see if you could make it with less speed/traffic, that's a relatively big expense, at least where i live