If I were twenty something, this might be intriguing but no way I'm agreeing to spend ten years in a beasement, no matter the amenities or payoff, at this point in my life.
However, if there is no choice and I have to do this;
Skylight 2
Full kitchen 6
Music 4
Medical care 2
Library 4
TV 7
Workout room 5
Would seriously consider reducing payout and adding;
Train set 2
Garden 2
Mayo care 1