In this subchapter, "owner-builder" means a person, other than a person who owns or operates a construction business:
(1) who:
(A) owns or purchases a piece of real property through a warranty deed or a warranty deed and deed of trust; or
(B) is purchasing a piece of real property under a contract for deed entered into before January 1, 1999; and
(2) who undertakes to make improvements to that property.