In the event a buyer of a manufactured home or mobilehome obligates himself or herself to purchase, or receive possession of, a manufactured home or mobilehome pursuant to a contract or purchase order, and the seller knows that the buyer intends to obtain financing from a third party without the assistance of the seller, and the buyer is unable to obtain the financing within 30 days of the execution of the contract or purchase order, the contract or purchase order shall be deemed rescinded and all consideration thereupon, other than escrow fees, shall be returned by the respective parties without demand.