Advanced Diploma completely free for or Startup Job building full-stack application

Hey all. I have a huge decision to make and I am almost lost.
Background: 28 year old dad with 4 kids, wife and house
I worked in the rail industry as a labouror for 6 years before getting injured. Because of this, I am going through workers comp who is covering my education (3 year advanced diploma). I am currently in my second semester.
Before going to school, in my spare time I took 7 Udemy / coursera courses in full-stack and unity development, built some pretty big solo projects and gained a ton of experience. Because of this, I was honors list in semester 1, and semester 2, I am sitting at 90's across the board in all my classes. All while paying very little attention to class, and tutoring my classmates (certified with my school).

I had an interview with a startup, who offered me a full-remote position at 80k. This is more than what worker's comp pays me (about an extra $1200 a month after tax), but I would also lose my paid for schooling. The job is building a website, and doing the backend API and database work. I would be building it all myself while the rest of the team handles the actual application. I live in a very low cost of living area (not GTA or even close, really) and the position is full remote

I have built full-stack apps before, and they sit in my portfolio. I DO feel like this is a bit out of my skillset, however I believe that I can rise to the occasion. I have also discussed them setting aside money in case I need to bring a contractor in to help me at some point which they have allowed.

I am terrified of giving up a free ride in school to take a job and ultimately get in over my head. Any advice would be super appreciated. I know most people will say experience > school, but what happens if I get fired a month in?