The rent for the Percy family's current house is £750 a month. Half of their annual family income - £24,000 plus tax credits - goes on rent and council tax.
Mrs Percy says that as children grow up, their parents' house is seen as their family home, somewhere for them to return to "and cry when you split up with your boyfriend".
"You've got all those memories there. But now, where you're in and out [of] homes after about a year, you never get the chance to build those memories," she says.