Buying a $120K SDE business - is this the worst idea?

Trust me, I know this is a bad idea. TLDR: I connected with a great guy who bought an oil change business 1.5 hours from home 1.5 years ago. His dad is sick and he just doesn't want to drive there every day.

It does $550k in sales and about $120K in SDE. He is working 6 days a week, so there's essentially no profit after his salary. He wants 4x SDE or just shy of $500K.

Great location, great demo, contracted work with a dealership, etc. My goal is to make $1m/year in 10 years. Is this a starting point into entrepreneurship or am I buying myself a headache?