1. However much money you think you'll need to start a business, you should take that number and double itI thought I had strategically planned every penny when I first started, but I had no idea that there would be so many unanticipated costs. Since we have a home office, I use temporary commercial office space and conference solutions for meetings and demonstrations. We always like to buy lunch for our clients, and we like them to lunch well.By the time everything is factored in, depending on how many people will be at lunch, you could be looking at a cool grand just as a baseline. Being a g...