According to this, there were 2 bedroom apartments that were about $100-200 a month in the 1960s.

https://sf.curbed.com/2017/5/8/15582164/sf-rentl-ads-newspapers-chonicle

Minimum wage was $1.25, so that means if you had a roommate then working 60 hours a month at minimum wage would pay for your half if rent was $140. Without a roommate obviously it'd double.