There are mathmatical answers to the feasability of your questions but, the practical answer if your just starting is do your homework take good advice and do tons of research. If you're willing to do that and you can find a good mentor you won't get rich but it can be achieved. Don't let your...
Sometimes I believe that is an attempt to rack up their post count trying to impress unsuspecting hobbiest into believing the have a real life cowboy on the other end of the computer screen giving them advice
Good Call