A Baltimore advocacy organization is offering $50,000 in housing assistance by lottery as part of an information fair for would-be homebuyers in the Waverly area on Saturday. The event at the Weinberg Family Center Y, 900 East 33rd Street, from 11 a.m. to 1 p.m. includes a neighborhood walking tour, and a chance to talk with mortgage lenders, real estate agents and representatives of Baltimore City Housing and the state. Those attending the event, which costs $10, will be eligible to apply for 10 awards of $5,000 each toward down payment and closing costs. After the event held by Live Baltimore — an independent nonprofit that promotes living in the city — a lottery will be conducted to select 10 winners from a pool of people who meet the requirements for the housing incentive program.