A new housing development, supported by funding from the landmark housing bill passed last year, aims to help an unexpected group affected by the affordability crisis: middle-income Nevadans. “We haven’t ever seen anything like it,” said Heidi Griffith, a mortgage loan officer who runs the homeowning-focused radio show ” Mortgage Matters .” “The law has created a lot of chatter.” Paradise Trails, a new subdivision in southeast Las Vegas, is the first development to sell homes after receiving