Veterans' Homelessness Prevention and Early Warning Act of 2010 - Revises federal provisions relating to default procedures for loans guaranteed by the Department of Veterans Affairs (VA) to require the Secretary of Veterans Affairs, within seven days after receiving notification from a veteran of a defaulted loan so guaranteed, to: (1) provide the veteran with specified financial counseling and advice relating to such foreclosure; (2) notify a VA homelessness case manager of the default; and (3) ensure that such case manager develops a plan to provide alternate housing for the veteran in case of loss of the home.