i know someone who is a dry wall expert. He makes GOOD money. he works for a company but on the side he does work on his own as well. He has his day job working for a boss, but in his spare time, he does work on his own, in order to get the extra work, which is money ALL in his pocket, he has to interact with the person that wants the job done. so if you want your customer interaction, you've got it right there. you just have to make sure you know what you are talking about and can do it quick.
he pulls in close to 90k a year, but he works very hard, and u doubt a new comer like you will earn that kind of cash, as least not for a WHILE.
drywall > fastfood^2