"To sell the farm" means to sell or give up something valuable or important that you own, often as a last resort or to solve a financial problem. Full definition
The second option is to sell the farm after your father passes, and split the estate. (moneysense.ca)
Two months after the book was published, I saw an article about someone who sold a farm on the condition that his family dog could stay on the farm. (realtormag.realtor.org)
There are little shops along the road that sell farm produce: honey, herbs and olive soap. (off-the-beaten-track.net)