You can live on $3,000.00 a month.
Living on $3,000.00 a month is very possible as long as you live somewhere cheap.
For example if you were to live in a place such as Kansas, Oklahoma, Utah, Arkansas etc you could live on $3,000.00 per month easily.
But if you live in a big city such as NYC or Los Angeles California or other big cities then $3,000.00 per month would be hardly enough to live on.
For example a NYC apartment alone could cost $3,000.00 per month so you would need to make a minimum of around $10,000.00 per month to live comfortably in NYC.
But if you had $10,000.00 per month and were living somewhere cheaper where rent or housing was cheaper and living expenses were cheaper than $10,000.00 per month would go much farther and even $3,000.00 per month would go much farther.
I live on $2,000.00 per month myself and I live cheaply in an owned house that is paid for, buy cheap groceries and only buy clothes when needed or buy something when needed.
Some people live on $1,500.00 or less so it's very doable but you have to watch your budget and spending.