Depends a lot on where you live. I used to make less than that but lived quite well. If your rent and car payment are low, $4k/month could easily leave you >

Depends a lot on where you live. I used to make less than that but lived quite well. If your rent and car payment are low, $4k/month could easily leave you > $1k/month to spend on "whatever". If you live in Silicon Valley and take home $4k/month, not so much.