You don't need credit to buy a house. Lenders these days are lazy. Instead of underwriting risks manually they allow credit scores/reports to dictate loans. I'd suggest going to a reputable lender if think you have to have a credit score to buy a house/land. It's also a crock of chit the bank tries to get you to believe.

A high credit score means that you have borrowed a ton of money. A zero credit score means you haven't borrowed (at least for a long time borrowed).