VA loans have what's known as a residual income requirement. Residual income is your remaining cash after all major debts and obligations are paid.
Residual income is measured to ensure borrowers and their families will have enough money to cover basic living costs (e.g., food, transportation), and amounts vary based on family size and part of the country. The VA loan program's success in terms of low foreclosure rate is due in part to these residual income requirements.