Answer: This is not an enforceable contract, because they is no agreement of what will happen if any of the party failed to fullfil it's obligation in the contract agreement.
Explanation: An enforceable contract is a legal agreement between two or more parties, which is backed by the law.
The agreement between Kendall Gardner and B&C shavings is not an enforceable contract because it would be defrauding for Kendall Gerdner to loss $25,860 paid to B&C shavings, just because they can't complete it's payment. It will also be unfair to B&C shavings since their have spend it's money to build the shaving mill.
Their contract agreement lacks what should be done if any party failed to fullfil its own part in the agreement.
B&C shavings doesn't have the right to withhold Kendall Gardner down payment, as it's not agreed in their contract.