There are a couple of ways to approach this that depend on your total family tax situation.

They can each give you a gift of up to $14,000 a year and there is no reporting required.  You have no income to be taxed and earn no Self-employment (Medicare and Social Security) credit.  They would not be able deduct any of those funds on their taxes.

Your could report it as Self-employed income on Schedule C.  Expenses that you incur are deductible also on your Schedule C.  

They can take some or all of the expense as a medical deduction on their Schedule A.  Money they pay you for food, and personal care items would not be a medical expense to them.