Realistic goals for real estate investing after college

[Brad S.]

I'm currently a 20 year old sophomore in college majoring in Electrical Engineering. After college, I plan on investing around 20k of my income per year into real estate using the BRRR strategy and living off the other 40k of my income (assuming I am making the average starting salary of Electrical Engineers). My parents own college rental properties so I grew up helping them rehab houses so I have an idea of what I'm getting myself into. I plan on doing as much rehab as I can in my spare time and hiring contractors to help with the rest because I'll also have a full time job. I also don't want to buy any properties while in college because I probably won't end up living in the city my college is in so ideally I'd buy my first property after college. My goal is to buy a million dollar building by the age of 30 with the refinance money from my residential properties, but I'm not sure if this is too lofty of a goal. What are your thoughts? Is this feasible?