It's not easy for everyone, but I'm pretty sure most professional software developers can pull it off if they try. And renting probably makes it easier, not harder. (I rent.)
A side-effect of having a year's living expenses saved up is that you have a measure of self-insurance against medical or legal misfortune. Combined with catastrophic health coverage, this makes it possible to weather even a fairly bad storm.
Beware of believing the party line on medical bills and bankruptcy, by the way. As far as I can tell, surveys showing that medical bills "contribute" to a large fraction of bankruptcies fail to establish causation. What they do show is that people who declare bankruptcy also often have significant medical bills. But of course many people do. I bet lots of people who declare bankruptcy also have car payments, maintenance, and repair bills, but it would be misleading to conclude that car costs are one of the biggest contributors to bankruptcy. Since no one is (yet) advocating for "national car coverage", the political motives are different.
A side-effect of having a year's living expenses saved up is that you have a measure of self-insurance against medical or legal misfortune. Combined with catastrophic health coverage, this makes it possible to weather even a fairly bad storm.
Beware of believing the party line on medical bills and bankruptcy, by the way. As far as I can tell, surveys showing that medical bills "contribute" to a large fraction of bankruptcies fail to establish causation. What they do show is that people who declare bankruptcy also often have significant medical bills. But of course many people do. I bet lots of people who declare bankruptcy also have car payments, maintenance, and repair bills, but it would be misleading to conclude that car costs are one of the biggest contributors to bankruptcy. Since no one is (yet) advocating for "national car coverage", the political motives are different.
See, e.g., http://content.healthaffairs.org/content/25/2/w74.long for more information.