Approx biweekly paycheck: $10,150 cash after taxes/deductions
House Payment: $4,500
Car Payment $3,208 (assuming $170k 5% interest for 60 months)
Student Loan payment: Probably $400/mo or so, but could be higher depending on interest, lets say $1,000/mo to be conservative.
So about $21,900/mo cash in pocket
House/Car/Student Loan expenses/mo: $8,708
That leaves $13,192/mo for other expenses: medical, food, entertainment, travel, insurance, etc.
If tney are living paycheck to paycheck, it is not because of the house/car/student loan.