And cost of living in the Bay Area is quite high to go along with it. Unless you're single with no kids, it's probably not very feasible for most people.
Very few people with kids to support should try this no matter where they live. When it just you (a supportive spouse with a day job can be helpful, but supportive is key) the worst case can get pretty bad: you can sleep under your desk in the cheapest roach apartment in town, eating beans for dinner - living on less than 1000/month for everything (you are taking a risk that you won't need the insurance you are skipping). This allows you to live for a long time on very little cash flow. Your bankers will wonder how you can run a business with so little money in the bank but you will always be on time for your minimal bills. It won't matter that you can't afford activities, because other than your daily 30 minute exercise in the local park you won't have time for any activities (even this is optional, but for your health I recommend it). Hopefully the business takes off after a couple years and you can settle down to a more normal schedule.
Once you have kids to support it gets harder. Not only are there more bills to pay, spending so much time on business means you miss many once in a lifetime opportunities to see the kids as they grow.
"Once you have kids to support it gets harder. Not only are there more bills to pay, spending so much time on business means you miss many once in a lifetime opportunities to see the kids as they grow."
The Torah confirms:
"... a man should build a house, plant a vineyard and then marry a wife” (Sotah 44a).
