Minnesota Legislative agenda, preview today: Welfare Dept says that more than 3000 patients now in state hospitals for mentally ill, retarded, and chemically dependent could be placed in community facitilies if and when such facilities become available. Money gap between Gov. Anderson budget allocation and Welfare request. How can community facilities provide more than custodial care? Also briefing on vocational and technical education, House Urban Affairs committee will hear about population trends, land use, housing, solid waste management, and transit.