Pretty sure you'd get more graft out of a labourer.
Him grafting full pelt and you in day off from the office mode should move it all pretty quick. Then you can get your parents over for a BBQ and spend some quality time with them.
Tell your parents you love them people, nobody lives forever.
That's what a dad is for. He can do some hard graft whilst granny looks after my daughter and the wife gets a break doing whatever.
Win win.