Fallout: New Vegas locations project
The Nash residence, home to Johnson and Ruby Nash, is a storefront that doubles as a house in the town of Primm. It also serves as the sole location of the Mojave Express throughout the Mojave Wasteland.
The building is located across the street from the Bison Steve Hotel and the Vikki and Vance Casino, and has a prominent "MOJAVE" sign situated atop the roof, overlooking the main street. Prior to completing the quest My Kind of Town, the building will be abandoned. Once the player completes the quest and the townsfolk vacate the casino, Johnson and Ruby Nash will return to live in the building. Johnson Nash buys and sells equipment and Ruby Nash will provide you with Ruby's casserole in exchange for one radscorpion poison gland each.
The broken robot is actually ED-E, who is a companion after you repair him.
The Nash Residence appears in Fallout: New Vegas.