Future Career Help : Network Engineer?

Okay so i wanted to a Systems Software Engineer, though i have heard by many that its one of the most stressful jobs available. I am 17,and a Senior, Trying to figure out my future career, My brother is a Networking engineer and he works at Mayo Clinic, im not sure how much he makes though im guessing anywhere from 55k-60k per year. Now dont say " choose a career that makes you happy.. etc "... Because any IT work i will enjoy. I love computers and i always had a natural thing for them, though i also enjoy trucks. I want to be able to make enough money for a family, a nice truck, dirtbikes... etc. Mainly a nice truck about 35k in total upgrades, im a very dedicated person, i WILL make sure that i get my desires. Im just wondering if i had a career in Network Engineering making minimum 55k, will i be able to afford a truck at 24k and about 9k in mods, and a house, and other common things? Assuming i do not have a wife, or kids. Now vise versa, i do have a wife ( with an okay job ) and a kid... THANK YOU SOOOOOO MUCH! I know it seems like alot, but ANYTHING would help.