(Seattle, WA)  --  Microsoft co-founder Paul Allen plans to donate 30-million dollars to assist homeless and low-income families in Seattle.  The billionaire owner of the Portland Trail Blazers and Seattle Seahawks says the permanent housing facility would benefit as many as 100 families.  The donation will help fund design and construction of the facility, for which a location hasn't yet been found.  The "Seattle Times" reports Mercy Housing Northwest will seek public funding to help defray the cost of running the facility.