GoVote.org. The cost of getting a Private Pilot's License varies depending on which type of flight training program you you choose. Federal Aviation Regulations (FAR) Part 141 flight schools require an approved, structured course of training, which includes a specified number of hours of ground training.
A corn or a callus is the most common cause of painful bump on bottom of foot, which results from constant pressure or friction from your tight shoes. Repeated trauma can also cause a hard spot on bottom of foot. Calluses can be really painful especially if you often stand on your feet all day.
When you have a plantar wart on the bottom of your foot, it can cause pain with each step. They are bothersome, but you may not want to take the effort of making a trip to the doctor to have them treated. If you browse the internet, you'll find references to simply covering them with duct tape.