Try making a simple spreadsheet for a startup, for example for 18-36 months. Before I ever did that, I always underestimated how far the money would go. Most wi

Try making a simple spreadsheet for a startup, for example for 18-36 months. Before I ever did that, I always underestimated how far the money would go. Most will be people. The examples you name have hundreds of people working for them. That really ads up.