Sussan Ley has shown off her newly purchased small plane, saying she bought it from a Sunshine Coast vendor to more easily crisscross her southern Riverina electorate.

Farrer MP Sussan Ley says the NSW and Victorian governments would be laughed out of the federal health minister's office if they requested extra Commonwealth funding for the Border's hospital project.

The Prime Minister has faced criticism from members within his own party after splashing $4.3 million on a clifftop home at Copacabana on the NSW Central Coast during a cost-of-living crisis.